Answer: D
Explanation: you got the one you click on right so no changes needed.
Answer:
D. Aa
Explanation:
Given:
Jill (mother) is heterozygous for gene A --------- i.e Jill = Aa
Jack (father) who is homozygous recessive for gene A-------- i.e Jack = aa
Now if both cross and fertilization occurs, we have:
A a
a Aa aa
a Aa aa
The offsprings are (Aa, Aa, aa, aa)
Nondsijunction is the inability of homologous chromosomes to seperate properly during cell division. Now, we were told that this fertilization undergone nondisjunction in meiosis 1. Hence, both homologous chromosome move into the same daughter cells instead of different daughter cells because separation of homologous chromosome does not occur properly.
Therefore the result of these fertilization of a normal haploid sperm with an egg that had undergone nondisjunction in meiosis yields offspring with genotype Aa of their Mother (Jill).
Phylogenetic tree is the evolutionary tree that shows the inferred evolutionary relationships among various biological species and organisms. <span>Phylogenetic relationship” refers to the relative times in the past that species shared common ancestors.</span>
According to the phylogenetic tree diagram, modern birds are most closely related to an advanced dinosaur.
The base change in the mutation of the cutting area of a restriction enzyme would determine whether a person is the bearer of that particular DNA.
Explanation:
The digestion of nucleic acid is done by the enzymes of restriction. It helps in recognizing the nucleotides sequence inside a DNA strand. It’s use detects in a DNA the points of mutation and helps in eliminating the need of sequencing.
This enzyme cuts DNA which later can be seen by using electrophoresis gel the bearing of the sequence by an individual. But this enzyme won’t recognize the site if any nucleotide pair is replaced.
