HELP ME PLEASEEE 1. What percentage of the offspring will be heterozygous?
2. Why does each parent contribute only one allele to the offspring?

1. 50%

2. Every gamete only contains 50% of the genetic information or half of the information for a gene.

Explanation: 1. Heterozygous means the pairs consist of a dominant and a recessive, or one big and one small letter, so only 2/4 or 50% are heterozygous.

2. Every sex cell has half of the chromosomes you need to make an embryo so you end up only having one allele as well

doctors i believe if i'm wrong sorry

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.