The purpose of mitosis is cell regeneration, growth, and asexual reproduction,while the purpose of meiosis is the production of gametes for sexual reproduction. Mitosis is a single nuclear division that results in two nuclei that are usually partitioned into two new daughter cells. The nuclei resulting from a mitotic division are genetically identical to the original nucleus. They have the same number of sets of chromosomes, one set in the case of haploid cells and two sets in the case of diploid cells. In most plants and all animal species, it is typically diploid cells that undergo mitosis to form new diploid cells. In contrast, meiosis consists of two nuclear divisions resulting in four nuclei that are usually partitioned into four new haploid daughter cells. The nuclei resulting from meiosis are not genetically identical and they contain one chromosome set only. This is half the number of chromosome sets in the original cell, which is diploid.
Answer:
225 flies
Explanation:
Let gene for body colour : A
Let gene for eye type : B
Parent 1 : normal body and normal eyes = AABB
Parent 2: ebony body and eyeless = aabb
F1 : AABB X aabb = AaBb ( all have normal body and normal eye )
F1 progeny is self crossed given that the two genes are on different chromosomes which means they show independent assortment:
AaBb X AaBb =
A_B_ = normal body, normal eyes = 9
aaB_ = ebony body, normal eyes = 3
A_bb = normal body, eyeless = 3
aabb = ebony body, eyeless = 1
Hence the ratio is 9 : 3 : 3 : 1
Out of the 400 flies:
(9/16) * 400 = 225 flies have normal body colour and normal eyes
i cannot see then Answer:
Explanation:
Fossils can provide ......information about the entire evolutionary process....
