Question

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When completing fruit fly crosses, what is counted at the end of the cross?
A.parent flies only
B.offspring and parent flies together
C.offspring flies only

Answer 1

A complete fruit fly crossing requires that at the end of the crossing only offspring flies be counted

Step-by-step explanation:

The fruit fly —Drosophila melanogaster— was one of the species used by Mendel to carry out his experiences related to genetics. Its rapid reproduction allowed the observation of hereditary characteristics —such as eye color and wing size— in the offspring.

Any experiment in genetics involving the crossing of fruit flies must ultimately take into account the offspring flies, their characteristics and phenotypic proportions.

Regarding the other options:

The characteristics and number of the parent flies are data already known before the crossing of fruit flies, so they do not represent a relevant data to be taken into account at the end of the crossing.