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26 Cards in this Set
- Front
- Back
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allele
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different forms of a gene
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amniocentesis
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method of retrieving fetal cells for genetic testing in which a long needle is used to withdraw a sample of amniotic fluid
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autosome
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chromosome other than a sex chromosome
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carrier
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molecule that combines with a substance and actively transports it through the plasma membrane
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choronic villi smapling
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method of retrieving fetal cells for genetic teting in which a long thin tube is passed through the vagina into the uteris, and suction is used to obtain a sample of cells
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cystic fibrosis
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generalized autosomal recessive disorder of infants and children where there is a widespread dysfunction of the exocrine glands
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dominant allele
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hereditary factor that expresses itself even when there is only one copy of in the genotype
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genes
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unit of hereditary located in chromosome
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genome
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all of the DNA in a cell of an organism
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genotype
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genes present in a zygote or within cells of an individual
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heterozygous
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different alleles in gene pair
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homozygous dominant
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posessing two identical alleles such as AA for a trait
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homozygous recessive
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posessing two identical alleles such as aa, for a trait
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karyotype
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arrangement of all the chromosomes from nucelus by pairs in a fixed order
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recessive allele
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hereditary factor that expresses itself only whn two copies are present in genotype
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sex chromosome
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chromosome responsible for development of sex characteristics for maleness or femaleness, either an x or a y
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sex linked
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alleles that occur on the sex chromosome but may control a trait that has nothing to do with the sex characteristics of a person
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syndrome
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a group of symptoms that characterize a disease
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trisomy
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state of having an extra chromosome, three instead of two
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x chromosome
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female sex chromosome
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x linked
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gene found on the c chromo that controls traits other then sex ual traits
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y chromosome
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male sex chromosome that carried genes involved in sex determination
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down syndrome
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human congenital disorder associated with an extra chromosome 21
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gene therapy
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method of replacing a defective gene with a healthy gene
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klinefelters syndrome
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XXY
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poly x female
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female with more then two X chromos
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