Suppose a race of aliens exists in which purple eyes aredominant to yellow and s

Question

Suppose a race of aliens exists in which purple eyes aredominant to yellow and slimy skin dominant to dry. They areprolific reproducers. Heterozygous individuals mate and produce2000 offspring. a. If the F1 offspring are as follows: 990 purple-eyed, slimy skin 990 yellow-eyed, dry skin 10 purple-eyed and dry skin 10 yellow-eyed and slimy skin Are these genes linked? _____ If you say yes how can you tell? _____ If you say no compute the crossover value for therecombinants? ____ Suppose a race of aliens exists in which purple eyes aredominant to yellow and slimy skin dominant to dry. They areprolific reproducers. Heterozygous individuals mate and produce2000 offspring. a. If the F1 offspring are as follows: 990 purple-eyed, slimy skin 990 yellow-eyed, dry skin 10 purple-eyed and dry skin 10 yellow-eyed and slimy skin Are these genes linked? _____ If you say yes how can you tell? _____ If you say no compute the crossover value for therecombinants? ____

Explanation / Answer

Yes, the genes are linked. If they were not, we would expect a 9:3:3:1 ratio of the offspring from heterozygous parents. As it is, there are many more offspring who are purple-eyed slimy skin, and yellow-eyed dry skin than purple-eyed dry skin and yellow-eyed slimy skin. The gene for purple eyes is therefore likely inherited with that of slimy skin, meaning that the gene for eye color and skin type are on the same chromosome (linked).

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