Multiple Choice
In the context of a monohybrid cross, what is a 'breed' most accurately defined as?
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2. Mendel's Laws of Inheritance
Monohybrid Cross
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In a monohybrid cross between two individuals with the genotype wwggpp × wwggpp, what is the expected genotype of the offspring?
A
All offspring will have the genotype wwggpp
B
Offspring will show a 3:1 phenotypic ratio
C
All offspring will have the genotype WwGgPp
D
Offspring will have genotypes in a 1:2:1 ratio
Verified step by step guidance1
Identify the genotypes of the parents: both are wwggpp, meaning they are homozygous recessive for all three genes (w, g, and p).
Recall that in a monohybrid cross, each gene is considered separately, but here all genes are homozygous recessive in both parents, so no variation is expected.
Determine the possible gametes each parent can produce. Since both parents are homozygous recessive for all genes, each parent can only produce one type of gamete: wgp.
Combine the gametes from both parents to find the offspring genotype. Since both gametes are wgp, the offspring genotype will be wwggpp.
Conclude that all offspring will have the genotype wwggpp, and there will be no phenotypic variation or typical Mendelian ratios like 3:1 or 1:2:1 in this cross.
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