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Answer to Question #83376 in Genetics for Daysia Sturdivant

Question #83376
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.
Expert's answer

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.

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