Question

The modern synthesis combined the concepts of _______ and evolution.

Answer 1

Answer:

1. genetics

2. constant

3. genetic drift

4. Modern synthesis combines the ideas surrounding evolution and natural selection with those of genetics.

5. A genotype is the genetic makeup of an organism. It describes the DNA that underlies a trait. There are dominant and recessive alleles and heterozygous and homozygous genotypes. A phenotype is the physical manifestation of that genotype.

6. The most common type of mutation is a deleterious mutation. Natural selection acts to remove this allele from the population.

7. The most common type of observed mutation is a neutral mutation. This mutation doesn't impact natural selection in any noticeable way since it doesn't impact the fit of that organism. Since neutral mutations convey no advantage, they generally must spread in a population through drift. Many also will disappear through drift.

8. During sexual reproduction, each organism is provided a copy of chromosomes from each parent, and this allows for new combinations of DNA.

9. This isn't an example of genetic drift because there's a genetic component to the ability to withstand severe temperatures. Therefore, this is an example of natural selection, related to surviving extreme environmental conditions

Explanation:

Answer 2

Answer:

The modern synthesis combined the concepts of _______ and evolution.

If a population is at Hardy-Weinberg equilibrium, the allele frequencies must be _______.

Seen more clearly in small populations, _______ is when allele frequencies change due to random chance, not selection.

Respond to the following based on your reading.

What two fields does modern synthesis combine?

How does a genotype differ from a phenotype?

What's the most common type of mutation, and what impact does it have on natural selection?

What's the most common type of mutation observed in living populations, and what impact does it have on natural selection?

How does the reproduction of organisms impact the diversity of genes?

If a proportion of individuals in a species dies because of extreme heat, is this an example of genetic drift? Why or why not?

Explanation:

This is for Penn Foster!