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7 December, 01:04

A sex linked trait can be defined by which genotypes. Choose all which apply.

a. Coded for on the X and Y chromosomes

b. Coded for on the X but not Y chromosome

c. Coded for on the Y but not X chromosom

d. a dominant allele on any chromosome

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Answers (1)
  1. 7 December, 02:11
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    a. Coded for on the X and Y chromosomes

    b. Coded for on the X but not Y chromosome

    c. Coded for on the Y but not X chromosome

    Explanation:

    The X and Y chromosomes are the sex chromosomes as they are involved in sex determination. All the genes that are present on the X and Y chromosomes are inherited along with these chromosomes and therefore, exhibit sex-linked inheritance.

    X and Y chromosomes share a homologous region. Therefore, the sex-linked genes are defined as the ones present on both X and Y chromosomes as well as the ones that are present on either X or Y chromosomes.

    For example, the gene for hemophilia is present on the X chromosome; but not on the Y chromosome. The SRY gene is present only on the Y chromosome.
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Home » Biology » A sex linked trait can be defined by which genotypes. Choose all which apply. a. Coded for on the X and Y chromosomes b. Coded for on the X but not Y chromosome c. Coded for on the Y but not X chromosom d. a dominant allele on any chromosome
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