Question

In TH Morgan’s experiment, of crossing a pure-bred red-eyed female with a white-eyed male:

a. F1 had all red-eyed males and females

b. F1 had all white-eyed males, and red-eyed females

c. F1 had all white-eyed females, and red-eyed males

d. F1 had all white-eyed males and females

e. None of the above

Answer 1

Given in the question In TH Morgan’s experiment, of crossing a pure-bred red-eyed female with a white-eyed male

TH morgan was a American scientist who observed white eyed mutant male in the group of red eyed drosophila then he crossed white eyed male with pure red eyed female and observed following progeny

As red colour trait allele is found on x chromosome and it is dominant over white eyed allele trait

Only single copy of allele present on one x chromosome is sufficient to produce red eye color.

All f1 progeny have red eye color

TH Morgan Experiment crossed pure Red eyed female & white eyed male P, Genotype - 9 X Why wt oxWy X Xwt x Xoy - Pi Garnetes XW Xwtyw Y xwty Х" х* 17 Crenotype (XWt XW) (xlity) fi Rustage ratio T T (Red eyed Red eyed Hence f had all Red eyed malo & Red eged temap fi Phenotype = ( All Red eyed malle

Hence correct answer is option a and other option can be eliminated