In marsupials, X inactivation occurs exclusively to paternally derived chromosomes. Which genes will ALWAYS be expressed in this situation?

A. maternal X-linked genes
B. paternal X-linked genes
C. maternal Y-linked genes
D. paternal Y-linked genes

A maternal x linked genes

Explanation:

In marsupials, X inactivation occurs exclusively to the paternally derived chromosome. The genes which are always expressed in this situation is that of maternal X linked genes (option A).

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.