According to
Morgan’s findings, eye colour gene is located on………
a) X-chromosome
b) Y-chromosome
c) autosome
d) all of these
Explanation: eye colour gene is absent on Y chromosome
What will be the eye colour phenotype of XRXw (heterozygous) in Drosophila?
a) red-eyed female
b) white-eyed female
c) red-eyed male
d) white-eyed male
Explanation: R for red eye colour (dominant), w for white eye colour recessive
What will be the eye colour phenotype of XRXR (homozygous dominant) in Drosophila?
a) red-eyed female
b) white-eyed female
c) red-eyed male
d) white-eyed male
What will be the eye colour phenotype of XwXw (homozygous recessive) in Drosophila?
a) red-eyed female
b) white-eyed female
c) red-eyed male
d) white-eyed male
What will be the eye colour phenotype of XRY (dominant allele) in Drosophila?
a) red-eyed female
b) white-eyed female
c) red-eyed male
d) white-eyed male
What will be the F1, when red-eyed female parent (XRXR) is mated with white-eyed male (XwY)?
a) 50% red-eyed female and 50% white-eyed male
b) 50% red-eyed female and 50% red-eyed male
c) 50% white-eyed female and 50% white-eyed male
d) 50% white-eyed female and 50% red-eyed male
Explanation: 50% XRXw (red-eyed female) and 50% XRY (red-eyed male) will be produced
