A) Which of the following scenarios will decrease the genetic variation of a population?
(1 point)
a mutation alters the sequence of a gene resulting in a new allele
an individual works out, increasing their muscle mass
a mutation in a chromosome makes it more likely to undergo genetic recombination
a population of birds suddenly decrease their frequency of sexual reproduction
c. a population of birds suddenly decrease their frequency of sexual reproduction
A) Two of the main drivers of genetic variation are mutations and genetic recombination.
During which process can these two events occur? (1 point)
binary fission
fertilization
mitosis
meiosis
d. meiosis
A) If a fish is able to breathe outside of water but does not reproduce, that trait (1 point)
is a disadvantageous mutation.
will be acquired by other fish.
will be inherited by other fish.
does not impact evolution.
c. will be inherited by other fish.
A) In which of the following scenarios would evolution by natural selection take place? (1 point)
Corn is genetically modified and cloned to make identical crops
A banana tree branch is planted, producing a clone of the parent tree
Penguins reproduce sexually, producing offspring that look different from one another
Microorganisms reproduce asexually, producing identical offspring
c. Penguins reproduce sexually, producing offspring that look different from one another
A) Which type of environment would tend to reduce genetic variation in a population because
of evolution by natural selection? (1 point)
a tropical rainforest that is being deforested for farmland
an old growth forest with trees that are over 1,500 years old
an ocean ecosystem that is becoming more acidic
grasslands that are undergoing severe drought