Term
| In which stage in embryonic development are the germ layers created? |
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Definition
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Term
| One of the main actions of the hormone progesterone is to: |
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Definition
| cause the endometrium to thicken. |
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Term
| The three embryonic germ layers formed during gastrulation are the: |
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Definition
| ectoderm, endoderm, and mesoderm. |
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Term
| Through which of the following tubes do both urine and semen travel? |
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Definition
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Term
| When does neurulation occur in the course of human development? |
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Definition
| in the third week of the first trimester |
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Term
| For which of the following reasons might a man claim a reasonable legal right to an embryo produced by fertilizing an egg with his sperm? |
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Definition
| The embryo contains half of the man's DNA . |
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Term
| Which of the following statements is true about external fertilization in most species? |
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Definition
| All of the above are true. |
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Term
| Contraception usually involves one of three methods. What are these three? |
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Definition
| preventing fertilization, preventing implantation, preventing ovulation |
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Term
| Which of the following is the correct description of a polar body that arises during oogenesis in humans? |
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Definition
| It is a haploid cell containing very little cytoplasm. |
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Term
| Infertility of two prospective parents is defined as: |
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Definition
| the inability to become pregnant after one year of trying. |
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Term
| Which of the following is TRUE about reproductive-related technology? |
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Definition
| Sperm can be sorted in the laboratory into those containing an X or a Y. |
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Term
| Which STDs can be treated with antifungal suppositories or creams? |
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Definition
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Term
| Which of the following is an example of ovoviviparity? |
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Definition
| An embryo develops inside a female great white shark but it is nourished from egg yolk that is packaged with it inside an egg. |
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Term
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Definition
| is the initial source of progesterone during pregnancy. |
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Term
| The completion of meiosis II in the oocyte of human females occurs: |
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Definition
| after the oocyte is fertilized by a spermatazoan. |
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Term
| Aside from the need to find a partner, which of the following is another major DISADVANTAGE of sexual reproduction? |
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Definition
| Finding a mate can consume lots of energy and time. |
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Term
| How does the "morning after" pill prevent pregnancy? |
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Definition
| It contains an overwhelming amount of estrogen that, in turn, prevents implantation of the embryo. |
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Term
| The "toxic semen" found in fruit flies has been discovered to have which of the following effects? |
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Definition
| Semen from a male fly suppresses further mating in a female for several days. |
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Term
| An animal called a hydra can reproduce by growing a miniature version of itself directly from the tissues of the parent. The miniature hydra then breaks off and grows to full size. This type of reproduction is best called: |
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Definition
|
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Term
| The acrosome of the sperm: |
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Definition
| carries the enzymes that help digest the exterior coats of the egg. |
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Term
| Individuals who carry two X chromosomes plus the SRY gene (through recombination in meiosis in their father's sperm), are: |
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Definition
| infertile males with smaller than average testes |
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Term
| Suppose a developing fetus does not carry the sex-determining region in its genome. What is the most common and expected outcome for this fetus? |
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Definition
| It will become a normal girl. |
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Term
| Tying off the vas deferens will: |
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Definition
|
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Term
| In which part of a sperm cell can mitochondria be found? |
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Definition
|
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Term
| Which of the following is true about birth control pills? |
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Definition
| They slightly increase the risk of cardiovascular disease in women, especially if they smoke. |
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Term
| The SRY, or sex determining gene, is most noted for: |
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Definition
| causing an embryo to develop into a boy. |
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Term
| Most of the "eggs" in the ovary are arrested as ________ in the process of oogenesis when a female reaches puberty. |
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Definition
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Term
| Which of the following is a known evolutionary adaptation arising from sperm competition? |
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Definition
| Both a) and b) are known evolutionary adaptations arising from sperm competition. |
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Term
| Which event in the menstrual cycle is triggered when blood estrogen levels fall and after the uterine lining is shed? |
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Definition
| FSH is released from the pituitary. |
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Term
| The _____________ is the site of gamete production in human females. |
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Definition
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Term
| Sperm are produced in the _______ and stored in the ________. They then travel into the penis through the ________ and are ejaculated through the ________. |
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Definition
| seminiferous tubules; epididymis; vas deferens; urethra |
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Term
| Your lungs are derived from which of the following embryonic germ layers? |
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Definition
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Term
| Which of the following is the correct sequence of human structures that sperm pass through, from where they develop to where they exit to the outside world? |
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Definition
| epididymis > vas deferens > prostate > urethra > tip of penis |
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Term
| Which of the following is NOT generally correct about the difference between egg and sperm in sexually reproducing animals? |
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Definition
| Eggs have more chromosomes than do sperm. |
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Term
| What is the most reliable signal that a woman is about to give birth? |
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Definition
| dilation of the cervix up to about 10 cm |
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Term
| Which type of reproduction is disadvantageous when the environment is ever-changing? |
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Definition
| Answer a), c), and d) are all disadvantageous. |
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Term
| What is the goal of the reproductive technology-related process known as "sperm sorting"? |
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Definition
| to increase the chances of having a girl or a boy, specifically, through ART |
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Term
| The part of the uterus that sloughs off at menstruation is a portion of the: |
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Definition
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Term
| The circular muscle at the opening to the uterus in human females is called the: |
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Definition
|
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Term
| Which of the following is located in the testis? |
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Definition
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Term
| Why are STDs nearly impossible to eradicate from the population? |
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Definition
| Infected people are often asymptomatic and all partners have to be treated simultaneously to prevent re-infection. |
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Term
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Definition
| the substance that is released when a woman first begins to lactate |
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Term
| Which of the following is found in nearly all mammals? |
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Definition
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