Human Reproduction Questions and Answers

Which of the following are possible advantages of sexual reproduction? It allows the species to endure periods of fluctuating or unstable environmental conditions. It enables the species to colonize new regions rapidly. It enhances genetic variability in the species. it is fast and easy it is energetically cheap to perform

The__ duct system develops into the epididymis, vas deferens, and seminal vesicles. Wolffian Gonadal Ejaculatory Mullerian Seminiferous

Select the correct option a. Type A spermatogonia b. One spermatogonium forms two spermatids. c. Spermiation is the release of sperms from seminiferous tubules d. Primary spermatocyte undergoes mitosis to form secondary spermatocytes. grows to larger primary spermatocyte.

A cell that has 3 copies of every chromosome is considered trisomic diploid aneuploid euploid Otriploid

The number of sperm cells that form from a primary spermatocyte is 100. 4 16. 2.

Nondisjunction involving the Y chromosome may occur during spermatogenesis and produce two kinds of sperm. If normal eggs were to fuse with these two types of sperm, which of the following genotypes are possible in the resulting embryos? XYY and XO XYY and YO XX and XY XXY and XO

Sexual reproduction produces offspring organisms that contain the same number of chromosomes as the maternal parent. are identical to each other and to the maternal parent, and contain the same number of chromosomes. are identical to each other and to the maternal parent. are genetically identical to each other. are genetically identical to the maternal parent.

During childbirth, the baby pushes on the wall of the uterus. This is detected by pressure receptors that signal the brain to release oxytocin. If this is a positive feedback process, select the likely next step. Oxytocin causes the uterus to contract, preventing further release of oxytocin from the brain. Oxytocin causes the uterus to contract, further stimulating the receptors and releasing more oxytocin from the brain. Oxytocin has no effect on the uterus so as to maintain homeostasis. Oxytoch causes the uterus to relax, decreasing pressure from the baby so as to maintain homeostasis,

There are two types of sperms 50% with X chromosome and 50% with Y chromosome. Which sperm is more likely to fertilize ovum that would develop into male offspring? Sperm with Y chromosome. Sperm with X chromosome. Sperm with XX chromosome. None of the above.

In mammals, the determining factor in sexual development of the external genitalia is the presence of: estradiol. neither estradiol nor testosterone. estradiol and testosterone equally. testosterone.

A person begins life in utero as a single cell called a(n) _____ that contains 46 chromosomes. After trillions of rounds of the cell cycle and cell replication by the process called _____, a complete person (composed of trillions of cells) eventually develops. zygote... mitosis animal cell... meiosis egg cell... binary fission zygote... binary fission animal cell... binary fission egg cell... mitosis

Close Reading of the Prologue Instructions: Complete the assigned tasks for each of the sections of this assignment. Note: A prologue is an introduction to a piece (literature or music), so readers (or audience members at a performance) would encounter the prologue as a way to "set the stage" for "Romeo and Juliet".

A newly married couple are planning to have a small family of two children and they are hoping to have a boy and a girl. What is the probability that they will have their 'ideal' family? 0.5 1.0 0.125 0.75 0.0625 0.25

Signal transduction may result in changes in gene expression and cell function, which may alter phenotype in an embryo. An example is the expression of the SRY gene, which triggers the male sexual development pathway in mammals. This gene is found on the Y chromosome. Which statement provides the evidence to justify the claim that signal transduction may result in an altered phenotype? a. If the SRY gene is absent or nonfunctional, the embryo will exhibit male sexual development. b. If the SRY gene is absent or nonfunctional, the embryo will exhibit female sexual development. c. An embryo with a male sex chromosome will always exhibit male sexual development. d. An embryo with two male sex chromosomes will always exhibit male sexual development.

Which of the following male-female homologous pairings is/are correct? A. scrotum --- labia majora B. vagina --- penis C.greater vestibular glands --- prostate gland D. A and B are correct E. All the above are correct

Which of the following is an advantage of using stem cells in cell-based therapies? stem cells are found only in the early stages of an organism's development stem cells have the ability to differentiate into specialized cells specialized cells are found only in the early stages of an organism's development specialized cells have the ability to differentiate into stem cells

Why do researchers prefer to use embryonic stem cells instead of adult stem cells? A. Embryonic stem cells are always unipotent stem cells. B. Embryonic stem cells can differentiate into more types of cells. C. Embryonic stem cells are less controversial to use. D. Embryonic stem cells are already differentiated.

What are the three phases of the ovarian cycle, and what main events occur in each phase? What are the broad ligament, ovarian ligament, and suspensory ligament of an ovary? How are the primordial, primary, secondary, and vesicular follicles different? List the hormones responsible for oogenesis, and explain each hormone's effect on oogenesis. What are the four contiguous segments of the uterine tubes, and what major events occur with each? List and explain what hormones influence the events in each part of the ovarian cycle. Compare the three phases of the uterine cycle. Describe the components of the female external genitalia. Compare and contrast the ovarian and uterine cycles. How are they interrelated?

For a healthy woman under age 30 with regular menstrual periods and having sex regularly but not using birth control, pregnancy typically occurs in two weeks. in about one year. in one month. in three or four months.

When division of the zygote reaches the eight-cell stage and the planes of cleavage of the upper four cells line up with those of the bottom four cells so that two tiers of cells result, one directly above the other, the type of cleavage is called O spiral cleavage. radial cleavage. direct cleavage. O indirect cleavage. protostome cleavage.

Most animals reproduce_____ and the _____ stage usually dominates the life cycle. asexually...haploid sexually...diploid sexually...haploid asexually...diploid