In fruit flies, the gene for red eyes (r) is dominant and the gene for sepia eyes (r) is recessive. if a red-eyed heterozygous fly (rr) mates with a sepia-eyed homozygous fly (rr), what are the possible genotypes of their offspring? (hint: you many want to complete a punnett square.)

rr only

rr, rr, and rr

rr and rr

rr and rr

The correct answer is Rr and rr.

The gene for sepia eyes which is (r) are the recessive, and the gene for red eyes which is R is dominant.

Their possible way of mating will be Rr which mates with rr.

Gene is termed as a sequence of RNA or DNA and it codes for molecule. When there is gene expression RNA is copied to DNA.

Protein which performs function is where RNA acts as intermediate template. Developmental and environmental factors which are along Genotypes they determine how phenotype will be.

Genes acquire mutation in the sequence which have different variants which are called alleles.

you know they are heterozygous for a trait because they have it as jj or jj.