Biology - Semester 2 Final Review

An organism's reproductive cells, sperm and egg cells, are called _____.

• bacteria

• prokaryotes

• gametes

• pathogens

A _______ is a segment of DNA that controls our traits.

• gene

• gamete

• chromosome

• chromatid

A _________ is DNA tightly coiled around proteins.

• gene

• chromosome

• trait

• mutation

The 2 exact copies of DNA in a chromosome are called ________.

• chromatids

• genes

• mutations

• pathogens

How many chromosomes does a human body cell have, total?

• 48

• 46

• 23

• 47

Chromosomes that are organized in pairs, are the same size, and have the same genes are called _______ chromosomes.

• homeostasis

• homologous

• matching

• sister

Body cells that contain both sets of chromosomes (from both parents) are called _________.

• diploid

• haploid

• triploid

• polyploid

The 23rd pair of chromosomes that contain the genes to determine the sex of an individual are called ___________.

• sex chromosomes

• autosomes

• homologous

• genes

The 2 female sex chromosomes are ___.

• XY

• XX

The 2 male sex chromsomes are _____.

• XY

• XX