There is variation in DNA.
The LITHOSPHERE is the rocky outer part of the earth , is is made up of the brittle crust an top of the mantle.
<span>False. A condition in which gametes are the same size and shape is isogamy. </span>
Sister chromatids have different alleles although carry same genes on same loci. So if it doesn't happen so, like if there are same alleles on sister chromatids then there is a problem in its formation. i.e., male and female alleles haven't contributed equally ( may be an error during their segregation process ). And obviously it doesn't happen in a real cell so we must understand this point. Because normally whenever it happens there's one half from the male and one half from the female. (i.e. maternal and paternal alleles contribute equally).
I hope you get the answer!!!
