Please answer numbers 18, 19, and 20
Homework Answers
18: Eukaryotic chromosomes are larger than the prokaryotic chromosomes. Since DNA replication starts at origin of replication, presence of multiple origin of replication speed up the process of DNA replication as needed to replicate a larger DNA molecule in time.
20: The heterozygous parent =AaBb
Homozygous recessive parent =aabb
If the gene A and B are linked, the heterozygous parent will form only two types of gametes = AB and ab
Gametes from homozygous recessive parent = ab
| AB | ab | |
| ab |
AaBb (both functional enzymes) |
aabb (both non-functional enzymes) |
| ab |
AaBb (both functional enzymes) |
aabb (both non- functional enzymes) |
Phenotypic ratio = 1 both functional enzymes : 1 both non functional enzymes
So, the genes A and B are linked making only two types of progeny from the cross.
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