Biology, 08.01.2020 23:31 buky0910p6db44

Explain how reduction division results in the form of a haploid gamete

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Answer from: noriko002

The reduction division also known as meiosis 1, results in the formation of haploid gamete from a diploid parent cell.

Explanation:

Meiosis is a type of cell division in which four haploid daughter cells are produced from a diploid parent cell having two copies of each chromosome. The daughter cells produced after meiosis are genetically different and each cell is haploid containing one-half the number of chromosomes as that of the parent cell by undergoing DNA replication and nuclear division.

During the interphase of meiosis, the synthesis of proteins and enzymes necessary for growth, and chromosomal replication takes place. Meiosis I and meiosis II are the phases of meiosis.

In prophase-I, the condensation of chromatin into chromosomes occur and a contact is established between homologous chromosomes. Then the crossing over of genetic material between these chromosomes takes place and as a result each chromosome is different to its parent chromosome. The chromosome pairs begin to separate and uncoil to allow DNA transcription. Then the nuclear envelope and nucleoli disappears and the microtubules attach to the chromosomes.

In metaphase-I, homologous chromosome pairs align at the center of the cell. Here half of each chromosome pair is positioned to each pole so that they do not end up in the same cell.

In anaphase-I , the shortening of microtubules start. They pull apart one chromosome of each homologous pair toward s the opposite poles. Then the elongation of cell begins.

In telophase-I , the microtubules disappears. At the opposite poles, chromosomes of each homologous pair reach and a new nuclear envelope develops around each haploid set of chromosomes. Chromatin is formed again as the chromosomes uncoil, cytoplasm pinches inward and divides (cytokinesis) forming two daughter cells. Later meiosis ll occurs, where four identical copies of daughter cells are produced from the two daughter cells formed during meiosis l.

Answer from: Quest

the real answer is b. scintillation counter

Answer from: Quest

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

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