Answered

Welcome to Westonci.ca, where your questions are met with accurate answers from a community of experts and enthusiasts. Our platform connects you with professionals ready to provide precise answers to all your questions in various areas of expertise. Get precise and detailed answers to your questions from a knowledgeable community of experts on our Q&A platform.

Unattached earlobes is a dominant trait, E. A parent who is homozygous for unattached earlobes is crossed with a parent who is homozygous for attached earlobes. What is the genotypic ratio of their offspring?

Sagot :

victorias16
Punnett Square time!!
The genotypic ratio for their offspring is 100% Ee (heterozygous)

View image victorias16

Answer: The correct answer is -

The genotypic ratio of the offsprings of given parents is 100% Ee (Heterotrozygous dominant that exhibit unattached earlobes).

Explanation:

As per the given information in the question, unattached earlobe is a dominant trait over the attached earlobe, which is a recessive trait.

Dominant trait (expressed by capital letter allele like E for unattached earlobes) masks the expression of recessive trait (that is  expressed by small letter allele such as e for attached earlobes).

Genotype of parents is-

EE (homozygous dominant) that will form 'E' and 'E' gametes.

ee (homozygous recessive) that will form 'e' and 'e' gametes.

When these parents are crossed, they will produce-

     EE × ee

=Ee, Ee, Ee, Ee

Thus, all offspring are heterozygous dominant (Ee) that will exhibit unattached earlobe trait due to the presence of dominant allele (E) in them.

Thank you for visiting. Our goal is to provide the most accurate answers for all your informational needs. Come back soon. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Discover more at Westonci.ca. Return for the latest expert answers and updates on various topics.