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30 Cards in this Set
- Front
- Back
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What are the human reproductive cells called? What are they called specifically for males? What are they called specifically for females? |
Gametes; Ovum; Sperm. |
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The heart of the cells is the ______ which stores the ______. |
nucleus; DNA. |
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How many chromosomes do humans have? |
46 total chromosomes |
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DNA contains the recipe for manufacturing what? |
Protiens |
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Humans have between __________ and ____________ genes. |
18,000; 23,000 genes |
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What is an allele? |
A variation in genes from another person |
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The instructions for making amino acids are on _________________ called __________? |
3 billion pairs of chemicals; base pairs |
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T.A.G. and C. stand for what when talking about base pairs? |
Thymine, Adenine, Guanine, Cytosine |
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What is nongenetic material made up of? What does it do? |
RNA and DNA; enhances, describes, and deletes. |
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Genes usually have ____ alleles with the exception of the _______ which can have ______. |
No; polymorphic; 2 or 3. |
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What is a minor change alleles make? What is a large one? |
Eyebrow Shape; Schitzophrenia. |
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What is the packet of instructions for a species called? |
Genome |
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The newly formed single cell after reproduction is called what? How many chromosomes does it have? |
Zygote; 46 chromosomes and 23 pairs |
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After the chromosomes from the parents pair up, the genetic inheritance, or __________ is formed. |
Genotype |
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What are gene pairs called when they match? What are they called when they don't match? |
Homozygos; Heterozygos. |
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Which pair of chromosomes determines the gender of the child? |
The 23rd Chromosome |
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If the combination is X-___, the child is a girl. If it is X-___, the child is a boy. |
X;y |
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By the time a baby is born, the original cell has become how many cells? |
5 Trillion |
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At the _____-cell stage ___________ begins to occur. |
eight; differentiation |
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Which type of twins are from the same cell? Which type of twins are from different cells? |
Monozygotic; Dizygotic |
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Two forms of ART are ____________ and ______. |
Fertility drugs; IVF |
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The ______________ are the observed characteristics of a person. |
Phenotypes |
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Alleles are ____________. When alleles do not _____ ____ they are called _____________ ______________. |
Additive; Add up; Dominant-Recessive. |
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Which gender expressed X-linked genes the most? |
Males |
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What causes Down Syndrome? |
Three copies of chromosome 21 |
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What is the Age of Viability's most important focus on? |
The development of the brain. |
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Color, Reflexes, Breathing, Muscle Tone, Heartbeat |
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What is considered normal birth weight? Low birth weight? |
7lbs; 5 1/2lbs or lower
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A ___________ is anything that increases the risk of prenatal abnormalities. |
Teratogan |
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All of the most important human characteristics are said to be ____________. |
Epigenetic. |
