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12 Cards in this Set
- Front
- Back
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where are autosomal dominant and recessive alleles located on chromosomes
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one of 22 autosomes
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5 key features of autosomal dominant alleles
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-every affected person has affected parent
-1/2 of children are affected -occurs equally in both sexes -can be expressed in each generation -having one allele results in expression |
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5 key features of autosomal recessive alleles
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-affected people usually have unaffected parent
-1/4 of children are affected -occurs equally in both sexes -may not be expressed every generation -must have both alleles to be expressed |
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what are Mendel's 3 types of crosses
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homozgygous phenotypes cross
-RR x rr monohybrid cross -F1 x F1 backcross F1 x rr |
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frequency of homozygous phenotype cross (RR x rr)
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all Rr
(this is the F1 generation) |
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ratio of monohybrid cross of two trait system
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9 dom, dom
3 dom, rec 3 rec, dom 1 rec, rec |
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formula for # of possible arrangements for heterozygotes on diff chromosomes
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2^(# heterozygous genotypes)
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formula for the probability that family has 5 children and at least 1 is a boy
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1 - P(all girls)
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frequency of monohybrid cross
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1/4 homo dom
1/2 Hetero 1/4 homo rec |
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define polygenic inheritance
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additive effect of 2+ genes on a single character
ex: height |
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polygenic inheritance is also known as...
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quantitative inheritance
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quantitative inheritance depends on what two factors
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genes and environment (nutrition)
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