Identify two different types of mating systems and list the advanta What will be an ideal response?
ANS:Polygyny
: males fertilize the eggs of many females during a breeding season. Males ensure
reproductive success but make little parental investment in their offspring.
Polyandry: one female mates with several males. Females may benefit from receiving gifts or
assistance from several males; in addition, infanticide may be reduced. However, it is not certain who
fathered the offspring.
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In a certain breed of chicken, two genes control color. A dominant allele (I) inhibits the expression of
any color gene (C). A second recessive gene (c) results in albinism when homozygous (cc). Give the F2 phenotypic ratio of a colored chicken ii CC with a white II cc. What will be an ideal response?
During prophase I of meiosis, homologous chromosomes lie side by side. This phenomenon is known as:
a. chromatid pairing. b. DNA replication. c. tetrad formation. d. paternal pairing. e. parental pairing.
Seth ordered lobster at a restaurant and realized that the outer shell was made of a tough carbohydrate similar to that used to make the carapace of a cockroach. What do you think the outer shell of the lobster is made of?
A. Cellulose B. Glycogen C. Fibrin D. Chitin E. Amylopectin
Consider a polysaccharide consisting of 828 glucose molecules. The total hydrolysis of the polysaccharide would result in the production of
A) 828 glucose molecules and 828 water molecules. B) 827 glucose molecules. C) 828 glucose molecules and no water molecules. D) 827 water molecules. E) 827 glucose molecules and 827 water molecules.