18 Questions
What is the purpose of meiosis?
To maintain a constant chromosome number in the species
What is the chromosome number in human somatic cells?
46
What is the chromosome number in human gametes?
23
What is the purpose of having homologous chromosomes?
To ensure the same gene is present on both chromosomes
What is the result of the fusion of an ovum and a sperm?
A diploid cell
What is the significance of genetic variability in a population?
It increases the chances of survival and adaptation of the population
What is the process that occurs during the S phase preceding meiosis?
Replication of DNA
Which phase of Meiosis I involves the formation of bivalents consisting of four chromatids?
Zygotene
What is the chromosome number reduced to during Meiosis I?
1n (haploid)
In which phase of Meiosis I do homologous chromosomes start to separate but remain attached by chiasmata?
Diplotene
What occurs in Metaphase I of Meiosis?
Alignment of paired chromosomes at the equatorial plate
During which phase of Meiosis I do homologous chromosomes continue to separate and chiasmata move to the ends of the chromosomes?
Diakinesis
What is the main function of the spindle microtubules during meiosis?
To move the chromosomes to the opposite poles of the cell
What is the key event that occurs during anaphase I of meiosis?
The homologous chromosomes separate and move to opposite poles
What is the primary difference between meiosis I and meiosis II?
Meiosis I involves the separation of homologous chromosomes, while meiosis II involves the separation of sister chromatids
What is the key event that occurs during metaphase II of meiosis?
The chromosomes align at the equator of the cell
What is the key event that occurs during anaphase II of meiosis?
The sister chromatids separate and move to opposite poles
What is the final outcome of meiosis II?
Four haploid daughter cells
Test your knowledge on Meiosis, the process involving two sequential nuclear divisions followed by cell divisions to produce gametes with half the number of chromosomes and DNA found in somatic cells. Explore the significance of meiosis in the formation of sex cells and zygotes with this informative quiz.
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