Exam 29: Reproduction and Development

Stem cells

Which of the following statements about sexual reproduction in animals is true?

In mammals, the trophoblast layer in a blastocyst will become part of the

The four sperm produced by spermatogenesis all have the same DNA sequence, but that sequence is different from the sequence of the sperm precursor cell.

To start a stem cell line from humans, a scientist would want to take a cell from the _______ of an embryo.

The number of chromosomes in secondary spermatocytes is fewer than in primary spermatocytes because

The ovaries produce ________ [more or fewer?] gametes than the testes.

Sperm are packed with mitochondria because mitochondria produce the

Some organisms can produce offspring genetically identical to themselves, without a mate.

Which of the following statements about sexual and asexual reproduction is true?

An aquatic animal that relies on currents to bring gametes together is likely to produce ________ [more or fewer?] gametes than a land animal that deposits its sperm directly within the reproductive tract of a female.

The stage in mammalian development when the embryo exists as a hollow, fluid-filled ball is referred to as the ___________.

During labor more and more oxytocin is produced due to ________ feedback.

Latex condoms prevent the spread of all types of sexually transmitted diseases.

Males produce significantly larger numbers of gametes than females because their goal in reproduction is to ensure that they successfully fertilize just one egg.

Which of the following behaviors is not specialized to help an animal find a mate?

Land animals are more likely to undergo fertilization outside their bodies because gametes require dry environments in order to fuse and develop.

In general, why does a female animal tend to choose her mate more carefully than a male does?

In human females, primary oocytes don't develop into mature eggs

In oogenesis, the final steps of meiosis do not occur until _______ takes place.