The first answer because if you "multiply" the T's and the t's together they come out with TT, Tt, and tt
PS: This would be a lot easier to explain if I could show you how
The answer is 75%
hope this helps!!
1) Genes are not visible under the microscope but chromosomes are visible under the microscope.
2) Gene mutations are small, but chromosome mutations are large.
3) Genes are composed of either DNA or RNA, but chromosomes are composed of DNA, RNA AND Histones.
4) A single gene is a locus on chromosome, but a single chromosome compromises of many genes.
Hope this helped :)
c. sulfur dioxide can block sunlight due to the thickness of the gas.
I believe the answer is D. the green revolution was instrumental in the increase of the world's food supply, but I may be wrong because it does have some negatives.