Question

Can you please help me with this problem:

1. A cell in G2 of interphase has 10 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages: a. Metaphase 1 of meiosis b. Prophase II of meiosis c. G1 phase, following the conclusion of mitosis d. Anaphase 1 of meiosis 2. Draw a pair of homologous chromosomes in G2 of the cell cycle. These chromosomes carry two different genes (each at a different locus) where the genotype is Aabb. Put the alleles on the appropriate chromatids. Label a pair of sister chromatids. Label a pair of non-sister chromatids.

Answer 1

Answer - 1

(a) if the G2 phase cell has 10 chromosome than the in metaphase first has cell has 10 chromosome and 20 DNA molecules because after the S phase chromatids and number of DNA molecules are double .

( b) after the anaphase and telophase first homologous chromosome are seprated towards different pole . Hence in prophase second of meiosis number of chromosome are 5 and number of DNA molecules are 10 because each chromosome in tetrad condition.

(c) after the completion of meiosis second same like mitosis number of chromosome is half hence number of chromosome after the meiosis second are 5 and numbers of DNA molecules are 5 .

(d) In the anaphse first homologous chromosome are 10 and number of DNA molecules are 20 because after anaphse homologous chromosome chromosome move to opposite pole  

Answer -2

answer of following question and diagram is given blow --

Ans-2 - Sixtur chosomatics Non-sixter Choromano Pair of Homoloques chromosome In G2 Phage

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