In the context of DNA structure, which nitrogenous base forms complementary base pairs with cytosine?

Which of the following chromosomes is most likely affected by a sex-linked trait?

Which statement is true of a sex-linked recessive gene?

Which types of inheritance are observed in the ABO blood group system of humans?

In the context of DNA structure, which nitrogenous base pairs with adenine?

In cats, the gene for fur color is located on the X chromosome, with the alleles B (black) and O (orange). Which of the following fur colors are possible in female cats due to X-inactivation?

If Brian has a son who is color-blind, which of the following statements is most likely true regarding the inheritance of the color-blindness allele?

Which statement about sex-linked traits is true?

Which of the following statements about the nuclei in most cells of a typical mushroom (the fruiting body of a basidiomycete fungus) is correct?