HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If the dog (Gilbert) is homozygous for having normal hearing, what are the chances the offspring will be deaf when mated with a deaf female?
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0%
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50%
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25%
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75%
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Explanation:
Detailed explanation-1: -If deafness is carried as a theoretical simple autosomal recessive gene (d), the breeding of two hearing carriers (Dd) (Table 1) will result, on average, in 25% affected dogs (dd), 50% hearing carriers (Dd), and 25% free of the defect (DD).
Detailed explanation-2: -Answer :-Female dog is heterozygous i.e. it has both recessive and dominant trait. Male dog is homozygous recessive i.e. it has both recessive traits.
Detailed explanation-3: -Since Gilbert can hear, his two possible genotypes are homozygous dominant ( DD ) and heterozygous ( Dd ).
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