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88 Cards in this Set
- Front
- Back
Union of a single egg and sperm. It marks the beginning of a pregnancy
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Conception
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Male and female germ cell
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gametes
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The male germ cell is a
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sperm
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The female germ cell is an
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ovum (egg)
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The process by which gametes are formed and mature.
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gametogenesis
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the process by which male gametes form and mature
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spermatogenesis
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The process by which female gametes form and mature.
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oogenesis
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Process of penetration of the membrane surrounding the ovum by a sperm
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Fertilization
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Fertilization takes place in the ______ of the uterine tube.
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ampulla
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The membrane becomes impenetrable to other sperm, a process termed____.
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zone reaction
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The ______number of chromosomes is restored when this union of sperm and ovum occurs
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diploid (46)
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The first cell of new individual.
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Zygote
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Within 3 days the zygote becomes a 16-cell solid ball of cells called
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morula
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The developing structure of the morula becomes known as _______ when a cavity becomes recognizable within it.
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blastocyst
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The outer layer of cells surrounding the morula cavity
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trophoblast
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Attachment process whereby the blastocyst burrows into the _____.
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Implantation:endometrium
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_____ or Finger like projections develop out of the ______ and extend into the blood filled spaced of the uterine lining. The uterine is now called the ______.
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chronic villi: trophoblast: decidua
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The portion of the lining directly under the blastocyst is called the _____ and the portion of this lining that covers the blastocyst is called the ____.
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decidua basalis: decidua capsularis
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The term that refers to the developing baby from day 15 until about 8 weeks after conception.
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Embryo
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The term that refers to the developing baby from 9 weeks of gestation to the end of pregnancy
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Fetus
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Membrane that surrounds the developing baby and the fluid.
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Amniotic membranes
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The _______is the outer layer of the amniotic membranes and becomes the covering of the fetal side of the placenta. The _____ is the inner layer.
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chorion: amnion
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Fluid that surrounds the developing baby in utero.
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Amnionic fluid
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Structure that connects the developing baby to the placenta.
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Umbilical cord
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The umbilical cord contains 3 vessels, namely 2 _____ and 1______.
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arteries: veins
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_____ is the connective tissue that prevents compression if the blood vessels to ensure continued nourishment of the developing baby.
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Wharton's Jelly
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______ is the structure composed of 15-20 lobes called________.
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Placenta: cotyledons
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The placenta produces ________ essential to maintain the pregnancy, supplies the ________ and _________ needed by the developing baby for survival and growth, and removes _______ and ______.
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hormones: oxygen: nutrients: wastes: carbon dioxide
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Capability of fetus to survive outside the uterus.
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Viability
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Surface active phospholipid that needs to be present in fetal/newborn lungs to facilitate breathing after birth.
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Pulmonary surfactants
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A ________ ratio can be preformed using amniotic fluid as one means of determining the degree to which the pulmonary surfactants phospholipids is present in fetal lungs
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lecithin-sphingomyelin
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Special circulatory pathway that allows fetal blood to bypass the lungs
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Ductus arteriosus
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Shunt that allows most of fetal blood to bypass the liver and pass into the inferior vena cava.
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Ductus venosus
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Opening between the fetal atria
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Foramen ovale
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Formation of blood
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Hematopoiesis
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Maternal perception of fetal movement that occurs sometime between ____ and ______ weeks of gestation.
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Quickening: 16: 20
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Dark green to black tarry substance that contains fetal waste products. It accumulates in the fetal intestines.
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Meconium
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Twins that are formed from 1 fertilized ovum that then divides. They are also called _________ twins.
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Dizygotic: fraternal
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Twins that are formed from one fertilized ovum that then divides. They are also called _______ twins.
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Monozygotic: identical
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The hereditary material carried in the nucleus of each somatic (body) cell; it determines an individual's physical characteristics.
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DNA
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A ________ ratio can be preformed using amniotic fluid as one means of determining the degree to which the pulmonary surfactants phospholipids is present in fetal lungs
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lecithin-sphingomyelin
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Special circulatory pathway that allows fetal blood to bypass the lungs
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Ductus arteriosus
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Shunt that allows most of fetal blood to bypass the liver and pass into the inferior vena cava.
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Ductus venosus
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Opening between the fetal atria
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Foramen ovale
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Formation of blood
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Hematopoiesis
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Maternal perception of fetal movement that occurs sometime between ____ and ______ weeks of gestation.
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Quickening: 16: 20
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Dark green to black tarry substance that contains fetal waste products. It accumulates in the fetal intestines.
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Meconium
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Twins that are formed from 1 fertilized ovum that then divides. They are also called _________ twins.
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Dizygotic: fraternal
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Twins that are formed from one fertilized ovum that then divides. They are also called _______ twins.
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Monozygotic: identical
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The hereditary material carried in the nucleus of each somatic (body) cell; it determines an individual's physical characteristics.
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DNA
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The process by which germ cells divide; producing gametes that each contain 23 chromosomes.
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Meiosis
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Failure of a pair of chromosomes to separate
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Nondisjunction
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Small segments of DNA
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Gene
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Abnormality in chromosome number; the numeric deviation is not an exact multiple of the haploid number of chromosomes
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Aneuploidy
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Cells that contain half of the genetic material of a normal somatic cell
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Haploid
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Union of a normal gamete with a gamete containing an extra chromosome resulting in a cell with 47 chromosomes.
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Trisomy
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X, Y
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sex chromosomes
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Genes at corresponding loci on homologous chromosomes that code for different forms or variations of the same trait.
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Alleles
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Process whereby body (somatic) cells replicate to yield two cells with the same genetic makeup as the parent cell
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Mitosis
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Term that denotes the correct number of chromosomes
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Euploidy
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The copy of the genetic material in humans
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human genome
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Process by which genetic material is transferred from one chromosome to another different chromosome
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translocation
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Threadlike strands formed of DNA
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chromosome
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Abnormality in chromosome number in which the deviation is an exact multiple of the haploid number of chromosomes
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Polyploidy
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Somatic cell containing the full number of 46 chromosomes
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Diploid
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Union of a normal gamete with a gamete missing a chromosome, resulting in a cell with only 45 chromosomes
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Monosomy
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A spontaneous and permanent change in normal gene structure
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Mutation
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A mixture of cells, some with the normal number of chromosomes and others either missing a chromosome or containing an extra chromosome.
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Mosaicism
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Environmental substance or exposure that results in functional or structural disability of the embryo/fetus
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Teratogen
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Analysis of human DNA, ribonucleic acid (RNA), chromosomes, or proteins to detect abnormalities related to an inherited condition
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Genetic testing
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Direct examination of the DNA and RNA that make up a gene.
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direct or molecular testing
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Examination of markers that are coinherited with a gene that causes a genetic condition
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linkage analysis
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Examination of the protein products of genes
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biochemical testing
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Examination of chromosomes
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Cytogenetic testing
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Type of genetic testing that is used to clarify the genetic status of asymptomatic family members. This type of testing includes______ testing to detect a disorder that is certain to appear if the defective gene is present and the individual lives long enough and _______testing to detect susceptibility to a disorder if the defective gene is present.
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Predictive testing: presymptomatic; predispositional
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Test used to identify individuals who have a gene mutation for a genetic condition but do not show symptoms of the condition because it is a condition that is inherited in an autosomal recessive form.
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Carrier screening
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Use of genetic information to individualize drug therapy.
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pharmacogenomics
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Therapy used to correct defective genes that are responsible for disease development; the most common technique is to insert a normal gene in a location within the genome to replace a gene that is nonfunctional
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Gene therapy (transfer)
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Matched chromosomes
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Homologous
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Term that denotes an individual with 2 copies of the same allele for a given trait If the 2 alleles are different, the person is said to be _______for the trait.
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Homozygous: heterozygous
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The genetic makeup of an individual; an individual's entire genetic makeup or all the genes that the person can pass on to future generations
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Genotype
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Observable expression of an individual's genetic makeup
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Phenotype
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Pictorial analysis of the number, form, and size of an individual's chromosomes.
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Karyotype
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Pattern of inheritance in which a single gene controls a particular trait, disorder, or defect.
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Unifactorial
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Genetic disorder in which only 1 copy of a variant allele is needed for phenotype expression
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Autosomal dominance
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Genetic disorder in which both genes if a pair must be abnormal for the disorder to be expressed.
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Autosomal recessive
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Disorder reflecting absent or defective enzymes leading to abnormal metabolism.
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Inborn error of metabolism
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Pattern of inheritance involving a combination of genetic and environmental factors
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Multifactoril
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