Question

Aliens from planet Zed have very similiar mechanisms of inheritance as humans do. You know that in these aliens green skin is dominant to orange skin and long eyestalks are dominant to short eyestalks. Sincec these aliens have been on the planet for such a short time you are unable to generate true breeding parental stocks. You have a female alien that has green skin and long eyestalks and you would like to determine what it's genotype is so you perform a test cross with this female.

1. What is the genotype of the male in the test cross?

You perform the cross and find that 233 of the offspring have green skin and long eye stalks and 217 have green skin and short eye stalks.

2. From this information, what is the genotype of the female Zed? Use of Chi-square goodness-of fit test to support your claim.

Answer 1

Similarly, if the female was GgLl, four different offsprings would have been produced.

If the female was GgLL, the offsprings would be GgLl (green, long) and ggLl (orange, long)

If the female was GGLl, the offsprings would be GgLl (green, long) and Ggll (green, short). This matches with the information provided in the question.

Therefore, the genotype of female- GGLl.