The question is incomplete as it does not have the option which are:
A) 100, 7
B) 100, 14
C) 200, 7
D) 200, 14
E) 400, 14
Answer:
A) 100, 7
Explanation:
The ascomycetes reproduce by the forming ascospores which are formed by the process of meiosis thus from 1 Parent cell, 4 daughter cells are reproduced. The 4 ascospores then undergo the mitosis and 4 daughter ascospores form 8 ascospores.
If the parent cell of an ascospore contains
1. Ploidy- 2n=14 chromosomes, therefore, Meiosis process will reduce the number to half and will form the n=7 in daughter cells.
2. The DNA amount- in G2 stage will be 400 ng therefore during meiosis I, two cells with 200 ng DNA and then two more cells with 100 ng will be formed after meiosis II.
Thus, A) 100, 7 is correct.
Answer:
Positive or negative effects.
Explanation:
Chromosomal changes is called mutation.
Mutation is change or alterations in genetic constituents or chromosomes of an organisms.
Not all chromosomal changes are negative or causes genetic disorder bit some have positive effects too.
The negative effect causes some genetic disorders but the positive don't have negative impact on health but only the chromosomal sequence might be alter , it functions is still intact.
Answer:
all of the dominant phenotype
Explanation:
Answer:
The correct answer would be (c)[m phase].
M phase or mitotic phase is the phase of the cell cycle in which the actual division of chromosomes (karyokinesis) into two daughter nuclei takes place.
It can be divided into four stages namely prophase, metaphase, anaphase, and telophase.
During anaphase, the sister chromatids of each replicated chromosomes are separated from each other and are pulled in opposite side with the help of mitotic spindle.
Then during telophase (last stage of M phase), the separated chromosomes reach either pole of a dividing cell. In addition, nuclear membranes are reformed around each chromosome set which forms the two daughter nuclei.
M phase is followed by cytokinesis which divides the cytoplasm, cell organelles, cell membrane, and two daughter nuclei into two daughter cells.
Note: Chromosome duplication or replication takes place in S phase while the division of the replicated chromosomes takes place in M phase.