Biology Questions 10 pts for best answer!!!!?
I’m finishing up a packet for biology but I can’t get these final questions:
1. To produce transgenic bacter that make insulin, which of the following steps did scientists have to take first?
A: Insert the human insulin gene into a plasmid.
B: Extract the insulin from the bacterial culture
C: Use a restriction enzyme to cut the insulin gene from human DNA.
D: Transform bacteria with the recombinant plasmid.
2. Why is Dolly (the sheep clone by (Ian Wilmut) a clone?
A: The source of her DNA was a single body cell.
B: The DNA molecules in all her cells are identical.
C: She was produced using the DNA from an adult’s egg cell.
D: She is genetically identical to her offspring.
3. Human females produce egg cells that have
A: one X chromosome only.
B: two X chromosomes
C: One X or one Y chromosome
D: One X and one Y chromosome
4.A person who has PKU
A: Inherited the recessive allele for the trait from one parent.
B: Inherited the recessive allele for the trait from both parents.
C: is heterozygous for the trait.
D: Will not pass the allele for the trait to his or her offspring.
5. If a man with blood type A and a woman with blood type B produce an offspring, what might be the offspring’s blood type?
A: AB or O
B: A,B, or O
C: A, B, AB, O
D: AB only
6. The sequencing of human chromosomes 21 and 22 showed that
A: Some regions of chromosomes do not code for proteins.
B: All of the DNA of chromosomes code for proteins.
C: different chromosomes have the same number of genes.
D: different chromosomes containt the same number of DNA bases.
Any help would be appreciated.
3 Responses
academicjoq
26 Feb 2010
bradley.john54
26 Feb 2010
1 – C – you take the humann gene out, insert it into a plasmid, put the plasmid into the bacterium and let the bacteria produce the insulin, then extract the insulin from the culture.
2 – A – B and C are true of all normal sheep, D would mean her offspring are clones of her.
3 – A – sperm contain either an X or a Y. When the sperm and egg combine you either get two Xs, female, or an X and a Y, male.
4 – B – its a recessive trait, so must be inherited from both parents. A heterozygous individual is a carrier for the trait and will have inherited the trait from one parent. The offspring of an individual with PKU may have PKU. They will inherit one recessive allele from the PKU parent. They may inherit another from the other parent, in which case they will have PKU, or they won’t, in which case they will be a heterozygous carrier.
gogo
26 Feb 2010
1 noidea
2 A and C are possible
3 D
4 B
5 D
6 no idea
1-C
2-D
3-A
4-B
5-C
6-A