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?

a. rr only

b. rr, rr, and rr

c. rr and rr

d. rr and rr

The possible genotypes of the offspring is Rr and rr.

Option C

Explanation:

C.Rr and rr ‘R’ represents a dominant allele for red eye and ‘r’ represents recessive allele for sepia eyes. Homozygous means combination of identical alleles whereas heterozygous means combination of two different type of allele.

When crossing takes place between two individual ‘Rr’ and ‘rr’ then possible outcomes becomes two offspring of ‘Rr’ (heterogeneous red eye), two offspring of ‘rr’ (homogeneous spia eye). So out of 4 offspring 2 will be i.e. 50% heterogeneous red eye and 2 will be i.e. 50% homogenous sepia eye.

wheres the answers ?

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest