Question

Species II has 2n = 14 chromosomes. How many chromosomes would be found in a monosomic of this species?

a)12
b)15
c)13
d)21
e)7

Answer 1

Option (c), A monosomic individual of a species with 2n = 14 chromosomes would have 13 chromosomes, as monosomy results in one fewer than the normal diploid number of chromosomes.

Step-by-step explanation:

Species II has 2n = 14 chromosomes, meaning that normally, each somatic cell would contain 14 chromosomes. A monosomic individual of this species would have one less chromosome than the diploid number due to nondisjunction during meiosis, which leads to a condition known as monosomy.

Therefore, a monosomic of species II would have 13 chromosomes (2n - 1), making the correct answer (c) 13.