A monohybrid cross of a co-dominant trait with lethal homozygote recessives will result in a: A)...

A monohybrid cross of a co-dominant trait with lethal homozygote recessives will result in a: A) 1:2 phenotypic ratio B) 9:3:3:1 phenotypic ratio C) Three traits being studied at the same time D) 1:2:1 genotype and phenotype ratio E) None of these

Expert Solution

Answers

D) 1:2:1 genotype and phenotype ratio

Explanation:

In the co-dominance traits both the allele will be expressed and dominated. therefore there will be no homozygous recessive. Details are explained below.

Explanations for wrong answers

A) 1:2 phenotypic ratio: This ratio may be obtained in the monohybrid cross of dominant versus recessive in which either homozygous dominant or recessive will be lithal.

B) 9:3:3:1 phenotypic ratio: This is a phenotypic ratio obtained after the dihybrid cross of dominant versus recessive alleles.

C) Three traits being studied at the same time: only one trait is considered in a monohybrid cross. Three traits will be considered in a trihybrid cross.

gladiator answered 2 years ago

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