Answer:
(a)1. the replication of genetic materials at S-phase of interphase of both mitosis and meiosis prior to cell division.( This ensured required amount of genetic material are present in the daughter cells to produce, and enough food source as raw material fro the entire division process.
2.the manner in which the the chromosomes are aligned at the center of the cell before the chromosomes separates. (This ensured that required or exact copies of chromosomes are available in the new daughter cells as the chromosomes migrates to new daughter cells at Metaphase and Anaphase.
(b)Number of cell cycles or division and crossing over
This occurs because of the number of cell divisions that occurs, Mitosis occurs in one cycle of division which multiplied the number of cells formed, and therefore refereed to as multiplication division.(2n)The new daughter cells have exact number of chromosomes as the parent cells. While meiosis occurs in two cycles of Meiosis 1 and 11. This is a reduction division(n) in which the new daughter cells have haploid or half of the parent chromosome numbers.
Crossing over is another feature which increases the chances of variation from the mixing up of genetic materials of both parents in the new daughter cells at a point called chiasmata. This makes the new haploid daughter cells having new genetic composition slightly different from both parents.
Answer: a. native species
Answer:
Explanation:
Given frequency of the two alleles i.e "B" and "b" are equal .
As per Hardy–Weinberg equilibrium, sum of frequency of the two alleles is equal to one.
i.e 
Since 
and 
will be equal to 0.5
Frequency of genotype "BB"
Frequency of genotype "bb"
As per second equation of Hardy–Weinberg equilibrium,
Substituting the values of p and q in above equation we get -
Red beetles have genotype BB and Bb
number of red beetles with genotype (BB)
number of red beetles with genotype (BB)
Total red beetles
Frequency of red beetles
Answer:
You cannot contract boils from someone who has boils.
Boils are not transferable from person to person
Carbohydrate digestion begins in the mouth with the secretion of saliva but most occurs in the duodenum as a result of the secretion of
secretin.
