Question 1.
Cystic fibrosis is an autosomal dominant disease caused by a mutation in the CFTR gene located in chromosome 7.
From the information obtained, we can conclude that Jack's parents are both carriers of cystic fibrosis, that is, they are heterozygotes (that is, they both have one healthy allele and one mutated allele). Jack's brother has the disease (he is a sick homozygote) so each of his parents has necessarily given him a mutated allele.
Question 2.
With the information we have, we can not accurately predict Jack's genotype.
Jack can not have two mutated allele, since he does not express the disease, but there remain two valid possibilities: either he is a heterozygous carrier of the disease (one of his parents transmitted him the disease) either is a healthy subject, that is, both of his alleles are normal.
Question 3.
For this couple to have sick children, both parents would have to be carriers of the disease so that each one of them would transmit a mutated allele.
So Jack would have the disease carrier (heterozygote) as well as Jill. An investigation (genetic counseling) in Jill's family is also needed to see if cystic fibrosis is spread in her family or not.
Answer:
Could you attach an actual pdf of the food chain so we can see?
The producer is whatever makes the food for the first organism in the chain.
Explanation:
The mitochondria and chloroplasts are much different in structure than bacteria
Several factors affect the rate at which enzymatic reactions proceed - temperature,pH<span>, enzyme </span>concentration<span>, </span>substrate concentration<span>, and the presence of any inhibitors or activators.</span>