what do homozygous and heterozygous mean?

Asked by Heena Firdaus | 13th Mar, 2011, 12:00: AM

Expert Answer:

Dear student,
Homozygous refers to having identical alleles for a single trait at corresponding chromosomal loci. Heterozygous, on the other hand, 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 or allele for round seed shape (R) and the other for wrinkled seed shape (r). A homozygous plant would contain the following alleles for seed shape: (RR) or (rr). A heterozygous plant would contain the following alleles for seed shape: (Rr).
Regards, Team Topperlearning

Answered by  | 14th Mar, 2011, 07:57: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.