A&P II Quiz 11

An individual who is homozygous dominant for a trait can be symbolized A. AA. B. Aa. C. aa. D. None of these is correct.

A. AA.

The phenotypes expected from the cross of a color-blind male and a normal (homozygous dominant) female are A. all males and females have normal color vision. B. all males have normal color vision and all females are color blind. C. ½ the males have normal color vision, and ½ are color blind; all females have normal vision. D. all females have normal color vision and all males are color blind.

A. all males and females have normal color vision.

The yolk sac functions to A. form blood cells in early development. B. provide nutrients to the fetus when the umbilical cord is disconnected. C. store metabolic wastes until the fetus is born. D. give rise to the primary germ layers.

A. form blood cells in early development.

Codominance is defined as A. gene pairs occurring in two forms that are expressed differently and neither is dominant to the other. B. when not everyone with a given genotype has the same phenotype. C. when the heterozygous phenotype is intermediate between the 2 homozygous phenotypes. D. none of these is correct.

A. gene pairs occurring in two forms that are expressed differently and neither is dominant to the other.

When the alleles of a gene pair are identical they are said to be A. homozygous. B. heterozygous. C. recessive. D. dominant

A. homozygous

A major difference between fetal blood flow and adult blood flow is that in the fetus the A. inferior vena cava contains blood high in oxygen. B. pulmonary artery delivers blood to the lungs. C. femoral vein contains blood low in oxygen. D. all of the above are different between a fetus and an adult.

A. inferior vena cava contains blood high in oxygen.

During active dying: A. loud breathing (a 'death rattle') may occur. B. a person will have difficulty sleeping (insomnia). C. skin can become red and flushed. D. all of the above.

A. loud breathing (a 'death rattle') may occur.

A gene is defined as a A. portion of a DNA molecule that contains the information for producing one kind of protein molecule. B. structure that is found in chromosomes. C. segment of RNA molecules. D. none of these is correct

A. portion of a DNA molecule that contains the information for producing one kind of protein molecule.

The term newborn refers to the period from birth through _____ , whereas the term infant refers to the period from _____ . A. the first four weeks; the first month to 1 year B. the first year; the first year to the second year C. one week; the second week through the second year D. 6 months; 6 months to 1 year

A. the first four weeks; the first month to 1 year

Which of the following is true regarding egg cells? A. they always contain an X chromosome. B. they contain an X or Y chromosome. C. they contain 23 pairs of chromosomes. D. none of these is correct.

A. they always contain an X chromosome.

In a simple dominant-recessive inheritance pattern, what percentage of the offspring would be expected to exhibit the dominant trait if one parent was heterozygous and the other was homozygous-recessive? A. 25% B. 50% C. 75% D. 100%

B. 50%

If the parent genotypes are AA and aa, the offspring are expected to be A. all AA. B. all Aa. C. ½ AA and ½ aa. D. ½ Aa and ½ aa.

B. all Aa.

If the parent genotypes for an autosomal dominant allele are AA and aa, the offspring are expected to be A. all AA. B. all Aa. C. ½ AA and ½ aa. D. ½ Aa and ½ aa.

B. all Aa.

A gene that is expressed in the heterozygous condition is called A. incomplete. B. dominant. C. recessive. D. pleiotropic.

B. dominant.

When the alleles of a gene pair are different they are said to be A. homozygous. B. heterozygous. C. recessive. D. dominant.

B. heterozygous.

Which of the following is true concerning milk production and secretion? A. estrogen and prostaglandin both stimulate breast development during pregnancy. B. specialized myoepithelial cells forcibly eject milk when they contract. C. colostrum stimulates milk release. D. all of the above.

B. specialized myoepithelial cells forcibly eject milk when they contract.

Which of the following is true in regard to the determination of the gender of a baby? A. the sex chromosome in the egg determines the gender of the baby. B. the sex chromosome in the sperm determines the gender of the baby. C. the cells of all babies contain the same sex chromosomes. D. none of these is correct..

B. the sex chromosome in the sperm determines the gender of the baby.

Which of the following would be possible blood types for the baby of a mother with type A and a father with type A blood? A. A only B. O only C. A and O D. A, B, AB and O

C. A and O

Which of the flowing is true of pleiotropy? A. the same phenotype results from actions of different genes. B. the heterozygous phenotype is intermediate between the 2 homozygous phenotypes. C. a single genetic disorder produces several different symptoms for the same disease. D. some individuals do not express a disease phenotype even though they inherit 2 dominant alleles.

C. a single genetic disorder produces several different symptoms for the same disease.

Ossification centers first appear _________________ after fertilization A. about 2-3 weeks B. about 5-6 weeks C. about 9-10 weeks D. about 3-4 months

C. about 9-10 weeks

Which of the following is TRUE concerning milk production and secretion? A. colostrum, which is high in antibodies, is released during the first year whenever the mom's immune system is highly active. B. estrogen and hyaluronidase both stimulate breast development during pregnancy. C. breasts may double in size during pregnancy. D. milk production ceases 6-12 months after delivery.

C. breasts may double in size during pregnancy.

The ductus venosus is a fetal vessel that functions to transport blood from the umbilical vein to the A. umbilical artery. B. aorta. C. inferior vena cava. D. superior vena cave.

C. inferior vena cava.

As a result of the foramen ovale, blood is allowed to bypass the A. aorta. B. liver. C. lungs. D. kidneys.

C. lungs.

Which of the following is TRUE concerning milk production and secretion? A. colostrum, which is especially high in fats, is released for the first few days after birth. B. milk production ceases 6-12 months after delivery. C. milk secretion is controlled by oxytocin release from the pituitary. D. all of the above.

C. milk secretion is controlled by oxytocin release from the pituitary.

As a result of the foramen ovale, blood _____________________________ A. moves from the pulmonary trunk into the aorta. B. bypasses the liver and enters the vena cava. C. moves from the right atrium to the left atrium. D. none of the above.

C. moves from the right atrium to the left atrium.

Which of the following is TRUE concerning milk production and secretion? A. colostrum, which is high in antibodies, is added to milk whenever the mom's immune system is highly active. B. estrogen and hCG both stimulate breast development during pregnancy. C. oxytocin stimulates milk release. D. milk production ceases 6-12 months after delivery.

C. oxytocin stimulates milk release.

The phenotypes and genotypes that would result from a cross of two normal-looking people who are both albino carriers are: A. phenotypes- all normal; genotypes- all heterozygous. B. phenotypes- half normal and half albino; genotypes- half heterozygous and half homozygous recessive. C. phenotypes- 3/4 normal and 1/4 albino; genotypes- 1/4 homozygous wild type, half heterozygous and 1/4 homozygous recessive. D. none of these is correct.

C. phenotypes- 3/4 normal and 1/4 albino; genotypes- 1/4 homozygous wild type, half heterozygous and 1/4 homozygous recessive.

The phenotypes and genotypes that would result from a cross of Aa and aa (A = normal pigmentation and a = albinism) are: A. phenotypes- all normal; genotypes- half heterozygous and half homozygous recessive. B. phenotypes- all albino; genotypes- all homozygous recessive. C. phenotypes- half normal and half albino; genotypes- half heterozygous and half homozygous recessive. D. none of these is correct.

C. phenotypes- half normal and half albino; genotypes- half heterozygous and half homozygous recessive.

A gene that is not expressed in the heterozygous condition is called A. incomplete. B. dominant. C. recessive. D. pleiotropic

C. recessive.

Incomplete dominance is defined as A. when gene pairs occur in two forms that are expressed differently and neither is dominant to the other. B. when not everyone with a given genotype has the same phenotype. C. when the heterozygous phenotype is intermediate between the 2 homozygous phenotypes. D. none of these is correct.

C. when the heterozygous phenotype is intermediate between the 2 homozygous phenotypes.

If the parent genotypes for an autosomal dominant allele are AA and Aa, the offspring are expected to be A. all Aa. B. ½ Aa and ½ aa. C. ½ AA and ½ Aa. D. ¼ AA, ½ Aa and ¼ aa.

C. ½ AA and ½ Aa.

In a simple dominant-recessive inheritance pattern, what percentage of the offspring would be expected to exhibit the dominant trait if one parent was heterozygous and the other was homozygous-dominant? A. 25% B. 50% C. 75% D. 100%

D. 100%

Which of the following would be possible blood types for the baby of a mother with type A and a father with type B blood? A. A & B B. A, B & AB C. A, B & O D. A, B, AB & O

D. A, B, AB & O

Which of the following would be possible blood types for the baby of a mother with type A and a father with type B blood? A. O only B. A and B C. A, B and AB D. A, B, AB and O

D. A, B, AB and O

Which of the following would not be a possible blood type for the baby of a mother with type AB and a father with type B blood? A. AB B. A C. B D. O

D. O

Which of the following is a characteristic of active dying? A. decreased sensitivity to touch and pain B. loud breathing (a 'death rattle') C. low blood pressure D. all of the above

D. all of the above

Labor is initiated and strengthened by A. stretching of the cervix. B. release of oxytocin from the posterior pituitary. C. declining levels of progesterone from the placenta. D. all of the above.

D. all of the above.

Which of the following is true concerning milk production and secretion? A. estrogen and progesterone both stimulate breast development during pregnancy. B. specialized myoepithelial cells forcibly eject milk when they contract. C. oxytocin stimulates milk release. D. all of the above.

D. all of the above.

A gene that is expressed in the heterozygous condition is called A. genotypic. B. phenotypic. C. recessive. D. dominant.

D. dominant.

Which of the following is true regarding sperm cells? A. they always contain an X chromosome. B. they never contain an X chromosome. C. they always contain a Y chromosome. D. none of these is correct.

D. none of these is correct.

The ductus arteriosus allows fetal blood to move from the A. right atrium into the left atrium. B. left atrium into the right atrium. C. aorta into the pulmonary trunk. D. pulmonary trunk into the aorta.

D. pulmonary trunk into the aorta.