Meiosis and Chromosome Behavior

The video tutorial explains the process of metaphase 1 in meiosis, highlighting the role of spindle fibers and the alignment of homologous chromosomes at the equatorial limit. It discusses the contribution of chromosomes from both paternal and maternal sides, forming homologous pairs. The tutorial concludes with a summary of chromosome positioning during metaphase 1.

What is the main difference between metaphase in mitosis and metaphase 1 in meiosis?

• Metaphase in mitosis involves homologous chromosomes.

• Metaphase 1 in meiosis involves homologous chromosomes.

• Metaphase in mitosis occurs twice.

• Metaphase 1 in meiosis does not involve spindle fibers.

What is the function of spindle fibers during metaphase 1?

• They create energy for the cell.

• They dissolve the cell membrane.

• They attach to chromosomes and help in their alignment.

• They help in the replication of DNA.

Where do spindle fibers originate from during metaphase 1?

• From the nucleus

• From the centrioles

• From the cell membrane

• From the cytoplasm

What defines homologous chromosomes?

• Chromosomes that are only found in mitosis

• Chromosomes that pair up during meiosis, one from each parent

• Chromosomes that are identical in every way

• Chromosomes that come from the same parent

How many pairs of chromosomes are contributed by each parent in humans?

• 23 pairs

• 46 pairs

• 1 pair

• 23 chromosomes

During metaphase 1, where are the centrioles located?

• At the equatorial limit

• Near the cell membrane

• At the polar regions

• In the center of the cell

What is the arrangement of homologous chromosomes during metaphase 1?

• They are aligned at the equatorial limit.

• They are scattered randomly.

• They are located at the polar regions.

• They are positioned at the cell membrane.