Sun December 02, 2012 By:

What are homozygoous and heterozygous traits?

Expert Reply
Mon December 03, 2012

Homozygous refers to having identical alleles for a single trait. Heterozygous refers to having two different alleles for a single trait.

Example - The gene for seed shape in pea plants exists in two forms, one form for round seed shape (R) and the other for wrinkled seed shape (r).

So for seed shape, a? homozygous plant wo?u?l?d? ?contain the alleles ??t?h?e? ?a?l?l?e?l?e?s? ??R?R ??? ?????or ??rr whereas a ???,? ?w?h?e?r?e?a?s? ?a? ????? heterozygous plant would contain the ???alleles ???R?r??.

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