Question

Humans have 23 pairs of chromosomes with around 22,000 genes. What about other species?

a) Other species have the same number of chromosomes and genes as humans.
b) The number of chromosomes and genes varies widely among different species.
c) Other species have fewer chromosomes but more genes than humans.
d) All species have a fixed number of chromosomes and genes.

Answer 1

Each species has a different number of chromosomes and genes.

Step-by-step explanation:

Each species has a different number of chromosomes and genes, so option b) is correct. Humans have 23 pairs of chromosomes, but other species may have more or fewer pairs. For example, dogs have 39 pairs, and fruit flies have 4 pairs. Similarly, the number of genes also varies among species. Humans have around 20,000 to 22,000 genes, but other species may have more or fewer genes depending on their complexity and evolutionary history.