Question

Questions from Lab 5
1.Draw a diploid cell with a total of four chromosomes, unduplicated.
2.Draw a diploid cell with a total of four chromosomes, duplicated.
3.Draw the daughter cells that would result from meiosis of the cell in the previous question.
4.Are the daughter cells that arise from meiosis diploid or haploid?
5.Suppose there is a gene for pod color in peas that has two alleles: Y (yellow color) and y (green color).  Which is dominant and which is recessive?
6.What are all of the possible diploid genotypes for pea pod color?

Answer 1

1. Diploid cell with total of 4 chromosomes, unduplicated:

2. After DNA duplication, each chromosomes consists of two sister chromatids as seen in figure.

3. Meiosis of diploid cell containing 4 chromosomes will result in 4 haploid daughter cells containing half the number of chromosomes as the parental cell.

4. Daughter cells will be haploid as meiosis is reduction division wherein homologous chromosomes pair with each other and segregate to different cells in meiosis I. sister chromatids separate in meiosis II.

5. Green color of pea pods is dominant and yellow color is recessive.