Why is there variation new organisms formed from the joining of two reproductive cells?

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above

Describe the layers of the suns atmosphere?