What two alleles do males have for gender?

A. X Chromosomes

B. Y Chromosomes

C. X and Y Chromosomes

D. Sperm cells do not contain sex chromosomes

What organism is the wolf's life intertwined with?

Cardiovascular fitness uses which of the following body systems? a. circulatory and digestive b. circulatory and respiratory c. digestive and respiratory d. respiratory and muscular

X-linked traits are primarily expressed in A. adulthood. B. females. C. people with an extra sex chromosome. D. males.

Why whitefish embryo cells and root-tip cells are used to study mitosis instead of cells in a human bone or plant life?

How do prokaryotes differ from eukaryotes? How are they the similar?

Enzymes work best at?

Which technique is used to separate the different cell parts?

How do scientists know that the universe is expanding? The Doppler effect shows stars with yellow shifted light The Doppler effect shows stars with green shifted light The Doppler effect shows stars with red shifted light The Doppler effect shows

What are two ways in which scientists transform plant cells without using plasmids?

Exploring how indoor air pollutions lead to respiratory problems is an example of using biology to what