HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Green peas are dominant to yellow peas. Determine the genotype and phenotype ratios for a heterozygous female and a heterozygous male.
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3:4 Gg 1:4 gg3:4 green 1:4 yellow
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2:4 GG 2:4 gg2:4 green 2:4 yellow
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3:4 Gg 1:4 gg3:4 green 1:4 yellow
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1:4 GG 2:4 Gg 1:4 gg3:4 green 1:4 yellow
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Explanation:
Detailed explanation-1: -The cross between heterozygous yellow seeded plant and green seeded plant will produce 50% yellow seeded plants and 50% green seeded plants.
Detailed explanation-2: -The genotypic ratio is 1: 2: 1 (YY-1, Yy-2 and yy-1).
Detailed explanation-3: -The cross between a green pea plant (Gg) and a yellow pea plant (gg) is shown below: From the cross, we can see that the possible genotypes are green and yellow. 50% of the offspring will have a Gg phenotype and 50% will have gg phenotype.
Detailed explanation-4: -Hence the genotype of the heterozygous yellow seeded plant will be “Yy” and that for green seeded plant will be “yy” (as the recessive allele is expressed only in homozygous conditions).
There is 1 question to complete.