Question

In the figure, which number produces haploid gametes by mitosis? 1 2 3 4 In the figure, which structure produces haploid spores by meiosis? 1 2 3 4 If four of the original colonists died before they produced offspring, the ratios of genotypes could be quite different in the subsequent generations. This would be an example of diploidy. gene flow, genetic drift. disruptive selection. stabilizing selection. Each of the following questions have a 3.points value: Please use the following information to answer the question(s) below. Diploid nuclei of the ascomycete Neurospora crassa contain 14 chromosomes, A single diploid cell in an ascus will undergo one round of meiosis, followed in each of the daughter cells by one round of mitosis, producing a total of eight ascospores. If a single, diploid G2 nucleus in an ascus contains 400 nanograms (ng) of DNA, then a single ascospore nucleus of this species should contain how much DNA (ng), earned on how many chromosomes? 100, earned on 7 chromosomes 100, carried on 14 chromosomes 200, carried on 7 chromosomes 200, carried on 14 chromosomes 400, carried on 11 chromosomes What is the ploidy of a single mature ascospore? haploid diploid triploid (three homologous sets of chromosomes) tetraploid (four homologous sets of chromosomes)

Answer 1

Answers:

42) In the question, I don't understand what does asker means by saying 'which number' ? As there is no number mentioned in the figure. However, I will answer assuming that the step (at top of the figure) in which gametophyte forms gamete by mitosis is step 1. So, the answer will be A, means 1 haploid gamete will be formed by 1 gametophyte.

43) Again in this question also asker is saying 'which structure' and answer options are in numbers and structures in figure are not numbered, so again there is lack of clarity in the question. However, the fact is that sporophyte, which is diploid (2n) will produce spores which are haploid (n), therefore if sporophyte structure is labelled as structure 2, the answer will be (B).

44) The answer is (C), genetic drift.

45) The answer is (A), 100 ng of DNA will be carried on 7 chromosomes.

46) The answer is (A), a single mature ascospore will be haploid.