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21 Cards in this Set
- Front
- Back
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A/a; B/b; C/C; D/d x A/A; B/b; c/c; D/d
What is the probability of obtaining A/a; B/b; C/c; D/d offspring? |
1/8
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P/p; l/l x P/p; L/l
What proportion of the progeny would be Purple & Long? |
3/8
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Which genotype(s) below could NOT be a parent of a child with blood type A?
a) IA/IB b) IA/i c) IB/i d) i/i e) They could all be a parent |
e) They could all be a paren
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What are thephenotypic ratios of:
Incomplete dominance or phenotypic ratio Co-dominance |
1:2:1
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What are the
phenotypic ratios of: Complete dominance |
3:1
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A 2:1 ratio might imply:
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allele lethal in the homozygous state
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polymorphic gene
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multiple alleles are wildtype
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Wild-type allele
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allele present in the population at
greater than 1% frequency |
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monomorphic
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a gene with only one wild-type allele
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There are 2 alleles of the cut gene. The frequency in the
population of the dominant allele is 95%. Which allele is wild type? A) dominant B) recessive C) both D) neither E) I don’t know |
C) both
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Genes affect trait
independently of each other Ratio of G/g; H/h X G/g; H/h? |
9:3:3:1
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Genes operate in a
pathway with similar- looking intermediates Ratio of G/g; H/h X G/g; H/h? |
9:7
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Genes operate in a
pathway with different intermediates Ratio of G/g; H/h X G/g; H/h? |
9:3:4
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epistasis
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The presence of an allele at one gene masks
the phenotype of another |
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epistasis
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the alleles of one gene mask the effects of alleles of another gene
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modifier gene
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genes whose alleles alter phenotypes produced by the action of other genes
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reduced penetrance
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less than 100% of the individuals possessing a particular genotype express it in their phenotype
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multifactorial trait
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a trait produced by the interaction of alleles of at least two genes or from interactions between gene and environment
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histocompatibility antigens
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cell surface molecules that are involved in the immune system and are highly variable
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pleiotropy
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one gene affecting more than one phenotype
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variable expressivity
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individuals with the same genotype have related phenotypes that vary in intensity
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