Quiz 4

Question 1

Prokaryotes lack a nucleus. Each cell contains a single circular double stranded DNA molecule. Sometimes one or more smaller circles of DNA are also present. What are these called?

Answer 1

Plasmids

Question 2

Humans have sex chromosomes and autosomes. In a normal human diploid cell, how many autosomes are present?

Answer 2

22 pairs

Question 3

When cells divide during simple growth, chromosomes are duplicated into identical chromosomes. There is no genetic recombination (chromosomal crossover) what is this called?

Answer 3

Mitosis

Question 4

Synapsis and chromosomal crossover happens during

Answer 4

meiosis

Question 5

The simplest possible DNA mutation is called

Answer 5

Point mutation

Question 6

the “bully” mutation results in an extremely muscular whippet, this mutation is a

Answer 6

Point mutation

Question 7

In DNA what is complementary to guanine

Answer 7

Cytosine

Question 8

In eukaryotes, protein-coding genes contain exons that are separated by

Answer 8

introns

Question 9

what percentage of your DNA consists of genes that code for proteins?

Answer 9

less than 2%

Question 10

A DNA sequence sometimes looks like a gene but on closer examination it contains one or more mutations that make it non functional. What are these genes called?

Answer 10

pseudogenes