Chapter 25: Reproduction and Development

Clicker Questionsby Kris Curran, University of Wisconsin-Whitewater

Which answer below is an example of asexual reproduction by fragmentation?

1. Planaria literally rip themselves apart and regenerate the missing pieces.

2. Unfertilized eggs of bees develop into drones.

3. Certain species of yeast form a small bud on the side of the cell that grows bigger and finally separates from the parent cell.

4. Copulation between a male and female cat.

Oviparity, ovoviviparity, and viviparity are all strategies for providing:

1. a moist environment for embryonic development.

2. a safe place for embryonic development.

3. a source of nutrients for embryonic development.

4. the environment necessary for fertilization to occur.

Which organ is a place where sperm mature and are stored before ejaculation?

1. Vas deferens2. Prostate3. Testis4. Epididymis5. Penis

If a female mates with multiple males, which adaptation would increase one male’s chances of fertilizing an ovum?

1. Produce more sperm than the other males

2. Block other male’s sperm from entering the female

3. Remove other male’s sperm from the female

4. All of the above

Meiosis usually produces four haploid cells. Why do oogonia in females only produce one haploid ovum?

1. Cytoplasm is lost between meiosis I and II.

2. Extra chromosomes are lost via formation of polar bodies in meiosis I and II.

3. Extra chromosomes are degraded during meiosis II.

4. Cytoplasm is retained in the polar bodies.

Which hormone is produced by the zygote and maintains the corpus luteum after fertilization?

1. Follicle stimulating hormone (FSH)2. Luteinizing hormone (LH)3. Human chorionic gonadotropin (HCG)4. Estrogen

The fusion of sperm and egg nuclei occurs in:

1. follicle cells.2. zona pellucida.3. egg cytoplasm.4. fallopian tube.

Low estrogen levels cause the pituitary to release FSH. Which birth control method blocks FSH release by the pituitary gland?

1. Birth control pills2. Hormone implants3. Morning after pills4. RU 4865. 1 and 26. All of the above

STDs are transmitted mostly via mucus secretion between sexual partners. Which birth control method would decrease the spread of STDs?

1. Birth control pills

2. IUD3. Condom4. Abstinence5. 3 and 46. All of the above

During which stage of early embryonic development do the three germ layers (ectoderm, endoderm, and mesoderm) form?

1. Cleavage2. Gastrulation3. Neurulation4. Differentiation

What structure provides food, waste removal, and gas exchange for the developing embryo and fetus during pregnancy?

1. Uterus2. Placenta3. Amnion4. Zona pellucida5. Corpus luteum

What hormone is involved in stimulating lactation?

1. Oxytocin2. Human chorionic

gonadotropin3. Prolactin4. Estrogen

If you were trying to conceive a baby using ART which procedure would you choose?

Females:1. IFT2. ZIFT3. GIFT

Males:4. IFT5. ZIFT6. GIFT

Classroom Catalyst

Reproductive Technology

and Human Cloning

Sheep, dogs, and endangered species have been cloned. Human cloning should also be allowed to occur.

1. Strongly agree2. Agree3. Neutral4. Disagree5. Strongly

disagree