GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
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Some dogs have erect ears; others have drooping ears. Some dogs bark when following a scent; others are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. A dog homozygous for both dominant traits is mated to a droopy-eared, silent follower. The phenotypic ratio expected in the F1 generation is ____
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9:3:3:1.
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100 percent of one phenotype.
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1:1.
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1:2:1.
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Explanation:
Detailed explanation-1: -In dogs, phenotype A (erect ears and barking while following a scent) is caused by dominant alleles; phenotype B (droopy ears and silent while following a scent) is caused by recessive alleles.
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