00:01
This question asks, in certain salamanders, the sex of a genetic female can be altered, changing her into a functional male.
00:07
These salamanders are called sex -reversed males.
00:10
When a sex -reversed male is made with a normal female, approximately 23 of the offspring are female, and 13 are male.
00:17
How is sex determined in these salamanders? so if we think about what happens in humans, if we have a zygote with two y chromosomes, it will not start.
00:30
Survive.
00:32
But salamanders have the zz, zw method of sex determination.
00:40
So zz will be for the males, whereas zw will be for the females.
00:47
And that is because females produce either a gamete with the z chromosome or the w sex chromosome, whereas males only produce gametes with the z sex chromosome.
01:01
Now, if it is sex -reverse salamander, we find that the phenotype will not correspond to the genotype of the organism.
01:14
So the female salamander that has been sex reversed in the question, right? so we have a sex reversed male made it with a normal female...