Explain why traits that are controlled by genes on the same chromosome do not always appear in the expected..?

Question

Explain why traits that are controlled by genes on the same chromosome do not always appear in the expected ratio in offspring.







Please help me on this biology question. Thank you very much!

Please briefly explain the answer in a 10th grader's point of view. Don't make it sound like a college student.

Once again, THANK YOU! i am grateful.

Answer 1

eye color and hair color.
each person has ab +ab = abab or aaab, or bbba.
does that make sence?

look in your index of your book under chromosome, controled genes.

they vary cuz they don't always add up exact.

Answer 2

in meiosis there's crossing over, where peices of chromosomes are exchanged between gametes. the purpose of this is to create variation in offspring. as far as not appearing in the expected ratio, well thats part of genetics- a lot of factors come in to play but generally dominant and recessive traits follow their expected ratio, but of course, sometimes not.

Answer 3

Linkage. These genes are so close together on the chromosome that they rarely crossover to other chromosomes.

Answer 4

This is determined by which parent gives the dominant trait and wich gives a recessive trait.