BIO-169: Chapter 29- Development and Inheritance

The gradual modification of anatomical structures and physiologic characteristics from fertilization to maturity is termed





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Which of the following statements concerning development is false?

a.The term induction refers to the chemical interplay between developing cells.

b.The developing oocyte receives molecules that affect development from the surrounding granulosa cells.

c.Each blastomere in the blastocyst receives exactly the same cytoplasmic composition.

d.Differences in a cell's cytoplasmic makeup affect the cell's genetic activity.

e.Cells release molecules that affect the developmental process of neighboring cells.
During implantation, the

a.trophoblast erodes a path through the endometrium.

b.inner cell mass begins to form the placenta.

c.maternal blood vessels in the endometrium are walled off from the blastocyst.

d.entire trophoblast becomes syncytial.

e.inner cell mass is temporarily deprived of nutrients.
Which of the following does not occur during pregnancy? a.A woman's respiratory rate and tidal volume increase. b.Maternal blood volume increases. c.Maternal nutrient requirements increase. d.A woman's glomerular filtration rate increases. e.A woman's bladder capacity increases.A woman's bladder capacity increases.Mammary gland development requires a combination of all of the following hormones, except a.oxytocin. b.placental prolactin. c.prolactin. d.human placental lactogen. e.estrogen.Oxytocin.Which of the following places the stages of labor in the correct order? a.placental, expulsion, dilation b.placental, dilation, expulsion c.expulsion, dilation, placental d.dilation, placental, expulsion e.dilation, expulsion, placentalDilation, expulsion, placentalUterine contractions that are irregular and brief that occur toward the end of gestation are called a.parturition. b.expulsion. c.true labor. d.Braxton-Hicks. e.dilation.Braxton-Hicks.In a(n) ________, an incision is made in the perineal musculature. a.episiotomy b.lumbar puncture c.crowning d.epidural e.peritoneal cutEpisiotomyFraternal twins result from egg that is fertilized by two different sperm. b.two different zygotes. zygote that splits into two zygotes. d.two eggs fertilized by one sperm cell. e.a blastula that splits into two blastulas.Two different zygotes.Which of the following does not occur at puberty? a.FSH levels rise. b.GnRH levels decline. c.Levels of sex hormones rise. d.Gametogenesis begins. e.Secondary sexual characteristics begin to develop.GnRH levels decline.As a person ages, a.the skin becomes more elastic. b.lung tissue becomes more elastic. c.peristalsis and muscle tone decrease. d.all hormone levels decrease. e.peristalsis and muscle tone decrease and some hormone levels decrease.Peristalsis and muscle tone decrease and some hormone levels decrease.The traits of an individual controlled by his or her genotype are his or her a.pleiotype. b.allotype. c.phenotype. d.isotype. e.genotype.Phenotype.The presence of a recessive gene can be detected (seen) only if the individual is a.homozygous recessive. b.heterozygous dominant. c.heterozygous recessive. d.homozygous dominant. e.epistatic recessive.Homozygous recessive.In polygenic inheritance, phenotypic characters are a.determined by a double pair of alleles. b.determined by interactions among several genes. c.determined by multiple copies of a single gene. d.always controlled by genes on the same chromosome. e.determined by the genes on the Y chromosome.Determined by interactions among several genes.