Question

difference in dna between parent cell & daughter cells
fill in the blanks based on your knowledge of mitosis and meiosis.

1. a human has 46 chromosomes in each body cell. how many chromosomes would be found in its daughter cells after mitosis?
2. a yeast cell has 32 chromosomes. how many chromosomes would be found in its daughter cells after meiosis?
3. a fruit flys gametes have ______ chromosomes, because its body cells have 4 chromosomes.
4. a kangaroos somatic cells have 12 chromosomes, so that means its sex cells have ______ chromosomes.
5. if cabbage plant has 9 chromosomes in its reproductive cells, then it means that it has 18 chromosomes in its ______ cells.
6. a fern has 600 chromosomes in its gamete cells. how many chromosomes would be found in its regular body cells? ______

meiosis:
what important event occurs during prophase 1? why is it important?

Explanation:

Step1: Mitosis property

Mitosis produces daughter cells with the same number of chromosomes as the parent cell.
For question 1: A human has 46 chromosomes in each body cell. After mitosis, the daughter cells will have the same number of chromosomes as the parent cell. So the number of chromosomes in daughter cells is \(46\).

Step2: Meiosis property

Meiosis produces daughter cells (gametes) with half the number of chromosomes of the parent cell.
For question 2: A yeast cell has 32 chromosomes. After meiosis, the daughter cells (gametes) will have \(\frac{32}{2}=16\) chromosomes.
For question 3: If body cells have 4 chromosomes, gametes (produced by meiosis) have \(\frac{4}{2} = 2\) chromosomes.
For question 4: Kangaroo's somatic (body) cells have 12 chromosomes. Sex cells (gametes) have \(\frac{12}{2}=6\) chromosomes.
For question 5: If reproductive (gamete) cells have 9 chromosomes, body cells (somatic cells) have \(9\times2 = 18\) chromosomes (since gametes are haploid and somatic cells are diploid).
For question 6: A fern has 600 chromosomes in its gamete cells. Body cells (somatic cells) have \(600\times2=1200\) chromosomes.

Step3: Prophase I in meiosis

In Prophase I of meiosis, homologous chromosomes pair up (synapsis) and exchange genetic material (cross - over). This leads to genetic variation in the offspring.

Answer:

1. \(46\)
2. \(16\)
3. \(2\)
4. \(6\)
5. somatic
6. \(1200\)

For the meiosis question: In Prophase I, homologous chromosomes pair up (synapsis) and cross - over (exchange genetic material). It is important because it creates genetic variation in the gametes, which leads to genetic diversity in the offspring.