HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1/2Aa:1/2aa
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1/4AA:1/2Aa:1/4aa
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3/4AA:1/4aa
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None of the above
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Detailed explanation-1: -Random union of gametes produces zygotes that develop into new individuals. Zygotic genotypes occur in characteristic ratios, according to the genotypes of the parents. produces an expected genotypic ratio of 1:2:1 among AA, Aa, & aa genotypes.
Detailed explanation-2: -The cross obtains AaBB : AaBb : Aabb genotypes in 1: 2: 1 ratio.
Detailed explanation-3: -A cross of two F1 hybrids, heterozygous for a single trait that displays incomplete dominance is predicted to give a 1:2:1 ratio among both the genotypes and phenotypes of the offspring.
Detailed explanation-4: -To estimate the genotypic and phenotypic ratio, calculate the number of Punnett squares with each allele combination. So, in this example, one Punnett square for both RR and rr and two Punnett square boxes for Rr. Calculating Punnett square ratios as 1:2:1 will give the genotypic ratio.