HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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BB
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Bb
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bb
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Detailed explanation-1: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.
Detailed explanation-2: -To determine the fraction of the offspring homozygous for both traits, first determine the genotype of an offspring homozygous for both traits. It would be aabb.
Detailed explanation-3: -Genotypes with two alleles that are the same, i.e. ‘BB’ and ‘bb’, are known as homozygous genotypes and genotypes with two different alleles are known as heterozygous genotypes.
Detailed explanation-4: -Answer and Explanation: For a homozygous dominant blood type B would would see the genotype IBIB, and for a type O would see the gentype ii. If we cross these we see that all the offspring will have the genotype IBi, or heterogygous for blood type B.