Question

Chromosomal abnormalities occur when the zygote's cells have….

23 pairs of chromosomes

gametes with 46 chromosomes

more than or fewer than 46 chromosomes

the usual number of chromosomes with damage to at least 4

Answer 1

1. 23 pairs is the typical amount of chromosomes, so this would not be a chromosomal abnormality.

2. 23 pairs would translate to 46 chromosomes, so this is also typical.

3. Any number that isn't 46 or 23 when it comes to chromosomes is abnormal, so this would be a chromosomal abnormality.

4. Damaged chromosomes are considered abnormal, so this would be a chromosomal abnormality.