In one kind of abnormal chromosome inheritance called down syndrome, a child has three copies of

a. chromosome x.

b. chromosome 21.

c. chromosome y.

d. chromosome 23.

What type of epithelial cell are taller than they are wide?

Which unit of geologic time is the oldest?

In humans, a widow's peak is caused by a dominant allele W, and a continuous hairline, by a recessive allele w. Short fingers are caused by a dominant allele S, and long fingers, by a recessive allele s.

What internal regulators do

If you were to take cells from different parts of your body (for example, a skin cell, a brain cell, and a liver cell) and compare the DNA inside of each cell would they have the same DNA inside of them? Yes or no? Why?

What is corono virus

Specialized sex cells, such as eggs and sperm, are called: a. gametes c. gonads b. diploids d. chromosomes

Which of the following items is best observed under a compound light microscop. A.) an atom B.) a colony of ants C.) a single-called organism D.) an underground fungal system

Which animals form a eusocial society? A) ants B) cheetahs C) polar bears D) moose

In what kind of envionment would you expect to find organisms that carry out fermentation