Question

if the number of chromosomes in ferns prothallus is 86,the number of chromosomes in spores is​

Answer 1

Ans : 4

Explanation:

In ferns spores are haploid hence they have half number of chromosomes where as embryo is diploid.

Answer 2

Answer:

The number of chromosomes in the spores of the female prothallus is 43.

Explanation:

The female prothallus especially in the case of ferns has a diploid (2n) number of chromosomes, whereas the spores contain only half or the haploid (n) number of chromosomes when they are made.

Therefore in the given question,

Let n be half the number of chromosomes,

2n = 86

∴ n = 43

Hence the spore of the fern prothallus will contain 43 chromosomes.