Question

select the correct statement(s) about sex determination in animals.
select all that apply.
the mechanism of sex determination varies with different animal species.
in all animals, males have the sry gene and females lack this gene.
in all animals, males are xy and females are xx.

Explanation:

• The first statement is incorrect because not all animals follow the XY - XX sex - determination system. For example, in birds, it is ZW - ZZ.
• The second statement is incorrect as not all animals have the SRY gene. The SRY gene is mainly associated with sex determination in mammals.
• The third statement is correct. Different animal species have diverse sex - determination mechanisms. For example, in some reptiles, sex is determined by incubation temperature, in mammals (a subset of animals) it is often related to sex chromosomes (with the SRY gene in many cases), and in birds, it is a different chromosomal system (ZW - ZZ).

Answer:

The mechanism of sex determination varies with different animal species.