The male elephant seal (l) is much larger than the female (r) of the species. Males spend very little time raising their young. You would correctly predict that the maleâs size is due primarily to _________ and that he is ___________in his mating habits.
a) natural selection; monogamous
b) sexual selection; polygamous
c) natural selection; polygamous
d) sexual selection; monogamous
The Good Genes Hypothesis would account for which of the following characteristics of males that attract the most females?
a) Peacock tails, which prevent males from seeing behind them when they court
b) Sailfin molly, a dorsal-finned fish, which are enormous and easily spotted by predators
c) Guppy tailfins, which reduce their swimming speed.
d) Gray tree frogs, that call the longest and produce offspring that mature quickest
e) Fish that produce bright colors, yet have very weak immune systems.
In mice, a recessive autosomal allele (o) results in obesity because the mice are unable to produce the hormone leptin from their fat cells.Normal mice with the dominant allele (O) do produce leptin. Homozygous recessive (oo) obese mice injected with leptin are observed to lose weight.
In a cross between two mice that are heterozygous for the obesity gene (Oo), you would predict which one of the following?
a) All the offspring will be obese.
b) All the offspring will be normal.
c) 50% of offspring will be able to produce leptin.
d) Obese offspring would eat less and burn more calories if injected with leptin.
e) Fat cells in obese mice release more leptin than those of their normal parents.
A scientist discovers a new mutant mouse that he calls âChunkyâ because they are 80% heavier than normal mice. Which one or more of the following predictions would be correct?
a) Chunky mice could have the âddâ genotype.
b) Normal mice produce more thyroxin (thyroid hormone) than Chunky mice.
c) Glycolysis would occur more rapidly in Chunky mice than normal mice.
d) A protein that blocks leptin receptors would promote weight loss in all Chunky mice.
e) Both (a) & (b) are correct.
When she was 6 months old, your cat was surgically altered so that they could not reproduce. This required a small incision into the catâs abdomen to remove the ovaries. This incision healed by a type of cell division called ______.
a) endocytosis b) meiosis c) mitosis d) exocytosis e) fusion
The male elephant seal (l) is much larger than the female (r) of the species. Males spend very little time raising their young. You would correctly predict that the maleâs size is due primarily to _________ and that he is ___________in his mating habits.
a) natural selection; monogamous
b) sexual selection; polygamous
c) natural selection; polygamous
d) sexual selection; monogamous
The Good Genes Hypothesis would account for which of the following characteristics of males that attract the most females?
a) Peacock tails, which prevent males from seeing behind them when they court
b) Sailfin molly, a dorsal-finned fish, which are enormous and easily spotted by predators
c) Guppy tailfins, which reduce their swimming speed.
d) Gray tree frogs, that call the longest and produce offspring that mature quickest
e) Fish that produce bright colors, yet have very weak immune systems.
In mice, a recessive autosomal allele (o) results in obesity because the mice are unable to produce the hormone leptin from their fat cells.Normal mice with the dominant allele (O) do produce leptin. Homozygous recessive (oo) obese mice injected with leptin are observed to lose weight.
In a cross between two mice that are heterozygous for the obesity gene (Oo), you would predict which one of the following?
a) All the offspring will be obese.
b) All the offspring will be normal.
c) 50% of offspring will be able to produce leptin.
d) Obese offspring would eat less and burn more calories if injected with leptin.
e) Fat cells in obese mice release more leptin than those of their normal parents.
A scientist discovers a new mutant mouse that he calls âChunkyâ because they are 80% heavier than normal mice. Which one or more of the following predictions would be correct?
a) Chunky mice could have the âddâ genotype.
b) Normal mice produce more thyroxin (thyroid hormone) than Chunky mice.
c) Glycolysis would occur more rapidly in Chunky mice than normal mice.
d) A protein that blocks leptin receptors would promote weight loss in all Chunky mice.
e) Both (a) & (b) are correct.
When she was 6 months old, your cat was surgically altered so that they could not reproduce. This required a small incision into the catâs abdomen to remove the ovaries. This incision healed by a type of cell division called ______.
a) endocytosis b) meiosis c) mitosis d) exocytosis e) fusion
