Skin color in fish is inherited via a single gene with 4 dif

Skin color in fish is inherited via a single gene with 4 different alleles (a) How many different types of gametes would be possible in this system? (b) What is the maximum number of different types of skin color gametes that could be produced from one individual fish? _________ A human individual is phenotypically female, but her interphase somatic nuclei do not show the presence of Barr bodies. (a) How many X-chromosomes would you expect to see in her karyotype? _________ (b) Explain your answer. _________ (c) How many chromosomes would you expect to find in this female\'s karyotype? _________

Solution

13. A) As this gene have four different alleles with respect to that gene, four different gametes would be possible.
13. B) As the fish is diploid, the maximum number of different types of skin colour gametes could be produced from one individual fish is 2.

14. A) One
14. B) One of the two X chromosomes turns in to Barr body, other will acts as a functional one. If the individual have only one X chromosome it will acts as a functional one, hence barbody would e
14. C) 45. (44 + X chromosome)