(30 points!) What is the relationship among DNA, a gene, and a chromosome?
A chromosome contains hundreds of genes, which are composed of DNA.

A chromosome contains hundreds of genes, which are composed of protein.

A gene contains hundreds of chromosomes, which are composed of protein.

A gene is composed of DNA, but it has no relationship to a chromosome.
A gene contains hundreds of chromosomes, which are composed of DNA.

Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days, followed by 7 days when no hormones are ingested. which of the following statements most accurately describes the effects of birth-control pills? -birth-control pills maintain constant levels of estrogens and/or progesterone so there is no surge in lh and ovulation does not occur.-birth-control pills inhibit the development of the uterine lining so implantation of a fertilized oocyte cannot occur.-birth-control pills maintain constant levels of estrogens and/or progesterones and mask the release of the oocyte from the follicle.-the 7 days with no hormones does not allow a thick enough uterine lining to form so a fertilized oocyte cannot implant.