In humans, the sex of an offspring is determined solely by the chromosomes donated by the male parent
Answer the following statement(s) true (T) or false (F)
Answer: True
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Chromosomes are often represented as an X, with two sister chromatids attached at the centromere. Do chromosomes always look like an X?
A. No, chromosomes only look like an X following DNA replication, and before cell division; the rest of the time, they only have one sister chromatid each. B. No, chromosomes only look like an X right after cell division; the rest of the time, they have only one sister chromatid each. C. Yes, chromosomes are always made up of two sister chromatids attached. D. No, chromosomes only look like an X when condensed, but they always have two sister chromatids attached.
Which characteristic is common to all groups represented on this evolutionary tree?
a. vertebrae b. bony skeleton c. four limbs d. amniotic egg or sac
Which of the following are common causative agents of STIs?
a. Hepatitis A virus b. Streptococcus pyogenes c. Neisseria gonorrhoeae d. HIV e. Trichomonas f. Candida albicans g. Hepatitis B virus h. Shigella
Matter composed of a single type of atom is known as a(n)
A) element. B) mineral. C) molecule. D) compound. E) electron.