Question 21

(Multiple Choice)

In Drosophila,Xw denotes a white eyed allele and X+denotes the red-eyed allele.An XwXwY female is crossed with an X+Y male.What are the possible progeny genotypes?


A) XwXwX+, XwY
B) In Drosophila,X<sup>w </sup>denotes a white eyed allele and X<sup>+</sup>denotes the red-eyed allele.An X<sup>w</sup>X<sup>w</sup>Y female is crossed with an X<sup>+</sup>Y male.What are the possible progeny genotypes? A) X<sup>w</sup>X<sup>w</sup>X<sup>+</sup>, X<sup>w</sup>Y B)   C)   D)   E) None of these
C) In Drosophila,X<sup>w </sup>denotes a white eyed allele and X<sup>+</sup>denotes the red-eyed allele.An X<sup>w</sup>X<sup>w</sup>Y female is crossed with an X<sup>+</sup>Y male.What are the possible progeny genotypes? A) X<sup>w</sup>X<sup>w</sup>X<sup>+</sup>, X<sup>w</sup>Y B)   C)   D)   E) None of these
D) In Drosophila,X<sup>w </sup>denotes a white eyed allele and X<sup>+</sup>denotes the red-eyed allele.An X<sup>w</sup>X<sup>w</sup>Y female is crossed with an X<sup>+</sup>Y male.What are the possible progeny genotypes? A) X<sup>w</sup>X<sup>w</sup>X<sup>+</sup>, X<sup>w</sup>Y B)   C)   D)   E) None of these
E) None of these

Answer