Which of the following scenarios will decrease the genetic variation of a population?(1 point)

Question

Responses

a mutation alters the sequence of a gene resulting in a new allele
a mutation alters the sequence of a gene resulting in a new allele

an individual works out, increasing their muscle mass
an individual works out, increasing their muscle mass

a mutation in a chromosome makes it more likely to undergo genetic recombination
a mutation in a chromosome makes it more likely to undergo genetic recombination

a population of birds suddenly decrease their frequency of sexual reproduction

Two of the main drivers of genetic variation are mutations and genetic recombination. During which process can these two events occur?(1 point)
Responses

mitosis
mitosis

meiosis
meiosis

fertilization
fertilization

binary fission

If a fish is able to breathe outside of water but does not reproduce, that trait(1 point)
Responses

is a disadvantageous mutation.
is a disadvantageous mutation.

does not impact evolution.
does not impact evolution.

will be inherited by other fish.
will be inherited by other fish.

will be acquired by other fish.

In which of the following scenarios would evolution by natural selection take place?(1 point)
Responses

Penguins reproduce sexually, producing offspring that look different from one another
Penguins reproduce sexually, producing offspring that look different from one another

Corn is genetically modified and cloned to make identical crops
Corn is genetically modified and cloned to make identical crops

A banana tree branch is planted, producing a clone of the parent tree
A banana tree branch is planted, producing a clone of the parent tree

Microorganisms reproduce asexually, producing identical offspring
Microorganisms reproduce asexually, producing identical offspring

Question
Which type of environment would tend to reduce genetic variation in a population because of evolution by natural selection?(1 point)
Responses

grasslands that are undergoing severe drought
grasslands that are undergoing severe drought

an ocean ecosystem that is becoming more acidic
an ocean ecosystem that is becoming more acidic

a tropical rainforest that is being deforested for farmland
a tropical rainforest that is being deforested for farmland

an old growth forest with trees that are over 1,500 years old

Answer 1

Here are the answers to your questions based on the provided scenarios:

1. Which of the following scenarios will decrease the genetic variation of a population?

   • Answer: A population of birds suddenly decrease their frequency of sexual reproduction.
     • Sexual reproduction promotes genetic diversity, and a decrease in sexual reproduction would reduce genetic variation.

2. Two of the main drivers of genetic variation are mutations and genetic recombination. During which process can these two events occur?

   • Answer: Meiosis.
     • Meiosis is the process that leads to the formation of gametes and involves both mutations and genetic recombination.

3. If a fish is able to breathe outside of water but does not reproduce, that trait:

   • Answer: Does not impact evolution.
     • For a trait to impact evolution significantly, it generally needs to be heritable and contribute to reproduction.

4. In which of the following scenarios would evolution by natural selection take place?

   • Answer: Penguins reproduce sexually, producing offspring that look different from one another.
     • Variation among offspring is a key requirement for natural selection, and sexual reproduction often leads to such variation.

5. Which type of environment would tend to reduce genetic variation in a population because of evolution by natural selection?

   • Answer: Grasslands that are undergoing severe drought.
     • In a harsh environment like severe drought, specific traits may be selected for, which can lead to a reduction in genetic variation as the population adapts to the stressor.

If you have further questions or need additional clarification, feel free to ask!