Question

select the true statements. most human body cells contain 23 pairs of chromosomes. each chromosome in a human cell contains the same genes. a chromosome is made of a condensed chromatin fiber. all living things contain the same number of chromosomes.

Explanation:

1. Most human body cells (somatic cells) are diploid and have 23 pairs of chromosomes, so the first statement is true.
2. Different chromosomes in a human cell carry different genes that code for different traits, so the second statement is false.
3. Chromosomes are formed by the condensation of chromatin fibers during cell - division, so the third statement is true.
4. Different species have different numbers of chromosomes. For example, fruit flies have 4 pairs of chromosomes while humans have 23 pairs, so the fourth statement is false.

Answer:

Most human body cells contain 23 pairs of chromosomes.
A chromosome is made of a condensed chromatin fiber.