Question

name: date: period:
meiosis worksheet identifying processes
on the lines provided, order the different stages of meiosis i through meiosis ii, including interphase in the proper sequence.

1. homologous chromosome line up in the center of the cell
2. spindle fibers pull homologous pairs to ends of the cell
3. 4 haploid (n) daughter cells form
4. cells undergo a round of dna replication
5. sister chromatids separate from each other
6. 2 haploid (n) daughter cells form

short answer questions:
1- how many cells do you end up with at the end of meiosis ii?
2- are the daughter cells (the produced) genetically identical to the parent cell? explain.
3- comparing and contrasting: describe a similarity and a difference between meiosis i and meiosis ii.
4- applying concepts: if a diploid cell containing 28 chromosomes undergoes meiosis, how many chromosomes will each daughter cell have?
5- compare and contrast: how are mitosis and meiosis similar and different?
read each statement, and then on the line write down the phase of mitosis or meiosis that the action occurs. if the action occurs in both, write both. the first one is done for you.
a- homologous chromosome line up in the center of the cell meiosis i, metaphase i
b- the individual chromosomes move apart.
c- spindle fibers pull homologous pairs to ends of the cell
d- 4 haploid (n) daughter cells form
e- cells undergo a round of dna replication

Explanation:

• Question 1: Meiosis II results in the formation of four haploid daughter cells. This is a key outcome of the meiotic process, as meiosis II is similar to mitosis in that it separates sister chromatids, but it occurs in haploid cells.
• Question 2: Daughter cells in meiosis are not genetically identical to the parent cell. Meiosis involves genetic recombination (crossing - over) during prophase I and independent assortment of chromosomes, which leads to genetic variation. In contrast, mitosis produces genetically identical daughter cells.
• Question 3:
• Similarity: Both meiosis I and meiosis II involve the separation of chromosomes (in meiosis I, homologous chromosomes separate; in meiosis II, sister chromatids separate).
• Difference: Meiosis I has homologous chromosome pairing (synapsis) and crossing - over (genetic recombination), while meiosis II does not. Also, meiosis I reduces the chromosome number from diploid to haploid, and meiosis II maintains the haploid number.
• Question 4: A diploid cell has \(2n\) chromosomes. If \(2n = 28\), after meiosis (which reduces the chromosome number by half), each daughter cell will have \(n=14\) chromosomes.
• Question a - e:
• b: The individual chromosomes move apart in mitosis (anaphase) and meiosis II (anaphase II).
• c: Spindle fibers pull homologous pairs to ends of the cell in meiosis I (anaphase I).
• d: 4 haploid (\(N\)) daughter cells form in meiosis II (telophase II).
• e: Cells undergo a round of DNA replication in interphase (which occurs before meiosis I and mitosis).

Answer:

1. Four cells.
2. No. Because of genetic recombination (crossing - over) and independent assortment of chromosomes during meiosis.
3. Similarity: Both involve chromosome separation. Difference: Meiosis I has synapsis and crossing - over, and reduces chromosome number; meiosis II does not have synapsis and crossing - over, and maintains haploid chromosome number.
4. 14 chromosomes.

a. meiosis I, metaphase I
b. mitosis, anaphase; meiosis II, anaphase II
c. meiosis I, anaphase I
d. meiosis II, telophase II
e. interphase