Sample Biology Essays On Chromosomal DNA Movement

Homework Question on Chromosomal DNA Movement

  1. What is the state of the DNA at the end of meiosis I? What about at the end of meiosis II?
  2. Why are chromosomes important?
  3. How are Meiosis I and Meiosis II different?
  4. Name two ways meiosis contributes to genetic recombination.
  5. Why do you use non-sister chromatids to demonstrate crossing over?
  6. How many chromosomes were present when Meiosis I started?
  7. Why is it ecessary to reduce the chromosome number of gametes, but not other cells of an organism?
  8. If humans have 46 chromosomes in each of their body cells, determine how many chromosomes you would expect to find in the following:

Sperm _________________

Egg _________________

Daughter cell from mitosis _______________

Daughter cell from Meiosis II _________________

  1. Investigate a disease that is caused by chromosomal mutations. When does the mutation occur?  What chromosome is affected?   What are the consequences?

Homework Answer on Chromosomal DNA Movement

What is the state of the DNA at the end of meiosis I? What about at the end of meiosis II?

The position of DNA remains identical at the end of the meiosis I as it is similar to mitosis but towards the end of meiosis II, 4 numbers of cells are formed from the initial one cell. Each cell formed has twenty-three chromosomes, which is half the number of the initial one cell, i.e. forty-six chromosomes. This indicates that, at the end the DNA is divided

The stages of meiosis

Why are chromosomes important?
Chromosomes are considered like vehicle of genetics for the reason that, they carry the DNA
molecules, which are referred to as master molecule or genetic material of living things that controls nearly all the characteristics from generation to the other.

Homework Help

How are Meiosis I and Meiosis II different?

Meiosis I is where the division of homologous chromosomes happens. They are split into two daughter cells, as crossing over happens in prophase stage. However, in Meiosis II crossing over does not take place since there are no homologous pairs present. Additionally, it separates chromatids and forms 4 cells.