Meiosis

Front

What is meiosis?

Back

Meiosis is a type of cell division that produces reproductive cells (gametes) in sexually reproducing organisms, resulting in four genetically diverse cells with half the number of chromosomes.

Front

What are autosomes?

Back

Autosomes are any chromosomes that are not sex chromosomes. In humans, there are 22 pairs of autosomes.

Front

What is the result of fertilization in terms of chromosome number?

Back

During fertilization, the fusion of two gametes (n+n) results in a diploid zygote with a total of 2n chromosomes.

Front

How many chromosomes does a human zygote have?

Back

A human zygote has 46 chromosomes, which is the diploid number.

Front

What phase of meiosis is characterized by the alignment of homologous chromosomes at the equatorial plane?

Back

Metaphase 1 is the phase where homologous chromosomes align at the equatorial plane.

Front

What is the difference between meiosis and mitosis?

Back

Meiosis results in four genetically diverse gametes with half the chromosome number, while mitosis results in two identical daughter cells with the same chromosome number.

Front

Define genetic variation.

Back

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to diversity in traits.

Front

What is a karyotype?

Back

A karyotype is a visual representation of an individual's complete set of chromosomes, organized by size and shape.

Front

What is the significance of crossing over during meiosis?

Back

Crossing over is the exchange of genetic material between homologous chromosomes during prophase 1, increasing genetic diversity.

Front

What is the role of spindle fibers during meiosis?

Back

Spindle fibers are responsible for separating chromosomes during cell division, ensuring that each daughter cell receives the correct number of chromosomes.