Please Use the Following Information to Answer the Question(s) Below

question 44

Multiple Choice

Please use the following information to answer the question(s) below.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N.
-Which of these statements is true?

• A) In humans, the 23rd pair, the sex chromosomes, determines whether the person is female (XX) or male (XY).
• B) Single, haploid (n) sets of chromosomes in ovum and sperm unite during fertilization, forming a haploid (n), single-celled zygote.
• C) At sexual maturity, ovaries and testes produce diploid gametes by meiosis.
• D) Sexual life cycles among different types of organisms are identical with respect to the relative timing of meiosis and fertilization.

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Definitions:

Pineal Gland

A small, pinecone-shaped endocrine gland in the brain that produces melatonin, a hormone that regulates sleep-wake cycles.

Melatonin

A hormone made by the pineal gland that regulates sleep and wakefulness.

Pituitary Gland

A small, pea-sized gland located at the base of the brain that produces hormones influencing various bodily functions.

Adrenal Gland

A small gland located above the kidneys that produces hormones such as adrenaline and cortisol, which are involved in stress response.