Answer to Question #83376 in Genetics for Daysia Sturdivant

Question

True or False: The Y chromosome of the paternal grandfather, father and son will always be the same in the absence of any mutation. If false, make it a correct statement. Explain your reasoning in either case.

Answer 1

True.

The Y chromosome is one of two sex chromosomes in mammals, including humans. It contains the SRY gene responsible for developing the testicles, determines inherited characteristics. The Y chromosome is always transmitted from father to son in unchanged form. A male receives Y chromosome from father and X chromosome from mother. Since the Y chromosome is represented by a single copy, it is not modified during the chromosomal crossover.