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Meiotic Stages in Allium Cepa Flower Bud

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Meiotic Stages in Allium Cepa Flower Bud

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Questions and Answers

What is the purpose of examining the meiotic stages occurring within A.cepa flower buds in this study?

To gain insights into the dynamics of chromosome behaviour, spindle formation, and cell division during meiosis in A.cepa.

At what stage of development are Allium cepa flower buds taken for the study?

3rd and 4th bud of the anther (PMCs).

What is the chromosome number of A.cepa buds used in this study?

2n = 16.

What staining solution is used in the procedure to visualize chromosomes?

1% acetocarmine solution. Signup and view all the answers

How are small pieces of tissue from the anthers prepared for observation under the microscope?

Dissected out using fine needles or forceps, placed on microscope slides, and covered with cover slip. Signup and view all the answers

How many chromosomes are present in the pollen grains of A.cepa observed in this study?

8 chromosomes. Signup and view all the answers

What is the main purpose of meiosis in eukaryotic organisms?

Formation of haploid gametes from diploid germ cells Signup and view all the answers

Why is Allium cepa (onion) commonly used as a model organism for studying meiosis?

Abundance of large and easily observable cells, high chromosome number, accessibility of actively dividing tissues, genetic stability, and well-documented characteristics Signup and view all the answers

Describe the key difference between meiosis I and meiosis II.

Meiosis I involves the pairing of homologous chromosomes and crossing over, while meiosis II involves the division of sister chromatids. Signup and view all the answers

What occurs during DNA replication in meiosis?

Formation of sister chromatids for each chromosome Signup and view all the answers

Explain the significance of crossing over in meiosis.

Exchange of genetic material between homologous chromosomes Signup and view all the answers

How many haploid daughter cells are produced from a single diploid parent cell in meiosis?

Four Signup and view all the answers