HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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She will give her offspring a “B”
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She will give her offspring both letters, “Bb”
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She will give her offspring either a “B” or “b”
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She does not provide any alleles; only the male provides alleles to offspring
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Detailed explanation-1: -Using the Punnett square, you can see that the probability of the Bb genotype is 1 / 2 1/2 1/2 .
Detailed explanation-2: -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.
Detailed explanation-3: -Because the child has blood type O, the child’s genotype must be OO. The mother is blood type B, which means that her genotype could be BB or BO. However, because she produced a child with type O, she must have passed an O allele on to the child, which means that the mother’s genotype must be BO.
Detailed explanation-4: -Each gamete contains a single copy of every chromosome, and each chromosome contains one allele for every gene. Therefore, each allele for a given gene is packaged into a separate gamete. For example, a fly with the genotype Bb will produce two types of gametes: B and b.