What would be a typical phenotypic monohybrid ratio in which a lethal allele is involved?
A)6:2:3:1
B)2:1
C)3:1
D)9:3:3:1
E)13:5

Question

Quizplus · Accepted Answer

A lethal allele will result in the death of any individual that carries it, therefore reducing the number of viable offspring in that category. This will lead to an altered phenotypic ratio from the typical Mendelian ratios. In a monohybrid cross involving a lethal allele, the ratio will be skewed towards the dominant phenotype as individuals carrying the lethal allele will not survive to contribute to the offspring. The most commonly observed ratio in such a case is 2:1, with two individuals displaying the dominant phenotype and one individual displaying the recessive phenotype but also carrying the lethal allele.

What Would Be a Typical Phenotypic Monohybrid Ratio in Which