Q1)why would harmful alleles that cause early diseases and early deaths continue to exist in our population?

Question

q2) what is the codon for serine?

q3)explain why genes were cloned by scienticts?

4) what is the paring of nucletides?

Answer 1

1:  They continue because they are recessive, and thus can transcend generations without being apparent.  Then, if by some rare chance they are placed together, the offspring gets them.

2:  UCU

UCC

UCA

UCG

3: Genes are cloned to try and research what genetic combinations are harmful and which ones are beneficial.  It can be used to cure diseases, like Alzheimer's and CF.  

4:  G and C

A and T (T is sub with U when dealing with RNA)

Answer 2

1. because sometimes the alleles are recessive. a person might be a carrier for the disease without actually being affected by it.