Which of the following is most likely to be a cause of infertility in a woman?
- unblocked fallopian tubes
- increased muscle mass
- eggs lacking motility
- a disease that hinders the implantation of the embryo into the uterus
Teratogen: From the Greek word tera, meaning “monster.” Any agent that causes a birth defect. The field of study that investigates the causes of birth defects is called teratology.
Which of the following is the main risk factor that a couple must be aware of when undergoing fertility treatments?
- high birth weight in babies conceived through such treatments
- an increase in the possibility of multiple births when such treatments are used
- negative psychological impact on children conceived through such treatments
- significant differences in developmental outcomes for children conceived through such treatments
David and Kelly are seeking help for infertility. Under their physician's guidance, they decide to undergo a procedure in which Kelly's eggs are combined in a laboratory dish with her husband's sperms. What is this procedure called?
- gamete transfer
- intracytoplasmic sperm injection
- zygote intrafallopian transfer
- in vitro fertilization
Fertilization: A stage in reproduction when an egg and a sperm fuse to create a single cell, called a zygote.
By far the most common high-tech assisted reproduction technique used is
- artificial insemination.
- in vitro fertilization.
- spermatogenesis.
- in vivo fertilization.
Fertilization: A stage in reproduction when an egg and a sperm fuse to create a single cell, called a zygote.
Don and Ellie are trying to conceive a baby. How long should they wait before they suspect infertility?
- 3 months
- 12 months
- 18 months
- 24 months
Life Span: The maximum number of years an individual can live. The life span of human beings is about 120 to 125 years of age.
In human beings, by the end of meiosis, each egg or sperm has ________ chromosomes.
- 46 paired
- 23 unpaired
- 23 paired
- 46 unpaired
Chromosomes: Threadlike structures that come in 23 pairs, with one member of each pair coming from each parent. Chromosomes contain the genetic substance DNA.
Meiosis is a specialized form of cell division that occurs to form
- split zygotes.
- extra chromosomes.
- somatic cells.
- eggs and sperm.
Meiosis: A specialized form of cell division that occurs to form eggs and sperm (also known as gametes).
During ________, a cell of the testes in men or ovaries in women duplicates its chromosomes and then divides twice, thus forming four cells, each of which has only half the genetic material of the parent cell.
- meiosis
- mitosis
- osmosis
- fertilization
Meiosis: A specialized form of cell division that occurs to form eggs and sperm (also known as gametes).
During the process of ________, a cell's nucleus-including the chromosomes-duplicates itself and the cell divides, resulting in the formation of two cells.
- meiosis
- osmosis
- fertilization
- mitosis
Mitosis: Cellular reproduction in which the cell’s nucleus duplicates itself with two new cells being formed, each containing the same DNA as the parent cell, arranged in the same 23 pairs of chromosomes.
A cell that contains 46 chromosomes arranged in 23 pairs undergoes the process of ________ to produce two new cells, each containing the same DNA as the original cell, arranged in the same 23 pairs of chromosomes.
- mitosis
- osmosis
- meiosis
- fertilization
Mitosis: Cellular reproduction in which the cell’s nucleus duplicates itself with two new cells being formed, each containing the same DNA as the parent cell, arranged in the same 23 pairs of chromosomes.
Which of the following is true of mitosis?
- Mitosis is the cellular reproduction that occurs to form the sperm and the egg cells.
- Mitosis results in the formation of four new cells.
- Mitosis results in the formation of two new cells with 23 pairs of chromosomes.
- Mitosis results in the formation of three new cells.
Mitosis: Cellular reproduction in which the cell’s nucleus duplicates itself with two new cells being formed, each containing the same DNA as the parent cell, arranged in the same 23 pairs of chromosomes.
A cell that contains 23 pairs of chromosomes divides by mitosis to form two new cells. How many pairs of chromosomes does each new cell contain?
- 12
- 23
- 6
- 48
Chromosomes: Threadlike structures that come in 23 pairs, with one member of each pair coming from each parent. Chromosomes contain the genetic substance DNA.
Except for the sperm and the egg, all cells in the human body have ________ chromosomes.
- 10
- 32
- 23
- 46
Chromosomes: Threadlike structures that come in 23 pairs, with one member of each pair coming from each parent. Chromosomes contain the genetic substance DNA.
________ introduced the theory of evolution by natural selection in 1859.
- Sigmund Freud
- Charles Darwin
- Stephen Hawking
- Wilhelm Wundt
Theory: An interrelated, coherent set of ideas that helps to explain phenomena and facilitate predictions.
Red-feathered and blue-feathered birds occupy the same environment. The birds with the red feathers are better able to survive and avoid predators. This means that the population of red-feathered birds will increase in future generations. This illustrates the process of
- genetic selection.
- natural adaptation.
- natural selection.
- genetic survival.
Naturalistic Observation: Studies that involve observing behavior in real-world settings.