Genetics Questions

The enzyme that breaks hydrogen bonds between nucleotide bases during DNA replication is:A. DNA polymeraseB. PrimaseC. HelicaseD. DNA ligaseE. Topoisomerase

What are the 2 types of reproductive isolating mechanisms?

A population of adult gazelles was threatened with overpopulation until cheetahs were imported. Within the same cohort, 1 year later, there were fewer gazelles, but the average running speed of the gazelles had increased. This is an example of:

Intelligence selection among humans/human ancestors over the last 10 million years is _______.

Through their studies of ground finch beak depth the Grants were able to demonstrate that, as a result of drought, ___________. Up to 3 answers may be correct.

The fraction of total phenotypic variance that is due to the genetic variance is called

In central Africa, the frequency (percentage) of the sickle-cell allele, compared to the wild-type allele, has remained stable over the years because the sickle-cell gene protects against malaria. In the United States, malaria was eradicated shortly before World War II by eliminating the mosquito that spreads the disease. What has likely happened to the frequency of the sickle-cell gene in African Americans living in the United States since the elimination of malaria?

Choose the one answer that indicates conditions under which evolution by natural selection must occur within a population.

What organelle is the site of protein synthesis?

A chain of nucleotides that codes for a specific trait is called a ________________.

Which macromolecule in living things sends chemical messages and creates traits?

Ultimately, each gene codes for the production of a ____________________.

What do we call a change in the nucleotide base sequence?

What cell organelle reads the code on the mRNA?

How much DNA is in each cell in meters?

Rosalind Franklin found the spiral shape of DNA with what process?

What is the first step in making a protein?

What would be the complementary strand to the following DNA sequence? TGACCAGC.

What other nucleic acid molecule is in cells and helps to copy the DNA code?

A series of 3 bases codes for the production of what chemicals?