A daughter will not be affected, but she will have a 50 percent chance of being a carrier like her mother. Of certain mutations also sometimes result in color variations between a large and his performance without expressing it. Therefore the male is called the heterogametic sex.
If the mother is heterozygous then half of the offspring will be red eyed and half white eyed, because both of the fathers sex chromosomes do not have the red allele the X and the Y and only one of the mothers carries it. Furthermore, when Morgan mated the red-eyed males of the F1 generation with their red-eyed sisters, [.
None of these dates work for me. Punnett square analysis is used to determine fruit flies eye color sex linked in Hampton ratio of offspring from a cross between a red-eyed male fruit fly and a white-eyed female fruit fly. Therefore half the females are homozygous red-eyed or heterozygous.
Can someone explain this? This quiz is incomplete! Using fruit flies that have previously mated may result in mixed offspring, which skews experiment results.
If the mother is heterozygous then half of the offspring will be red eyed and half white eyed, because both of the fathers sex chromosomes do not have the red allele the X and the Y and only one of the mothers carries it. Sign up using Email and Password. Simple Mendelian sex-linked chromosome fruit fly question Ask Question.
Karyotypes and Pedigrees. Sign up to join this community. In an X-linked cross, the genotypes of F 1 and F 2 offspring depend on whether the recessive trait was expressed fruit flies eye color sex linked in Hampton the male or the female in the P 0 generation.
By they produced about one-quarter white-eyed males what is meant is that a quarter of all individuals were white-eyed males. When a gene being examined is present on the X chromosome, but not on the Y chromosome, it is said to be X-linked.