Chromosome Abnormalities and Non-Mendelian Inheritance Video Lessons

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Problem: If a cell has a diploid number of 10 (2n=10), how many chromosomes will be in each of the four daughter cells if one pair of the chromosomes experiences nondisjunction during meiosis I?A. There will be two cells with 5 chromosomes and two cells without any chromosomes.B. There will be two cells with 5 chromosomes, one cell with 6 chromosomes, and one cell with 4 chromosomes.C. There will be two cells with 10 chromosomes and two cells without any chromosomes.D. All four cells will have 5 chromosomes.E. There will be two cells with 4 chromosomes and two cells with 6 chromosomes.

FREE Expert Solution

Nondisjunction is an error in cell division where the members of a pair of homologous chromosomes/sister chromatids did not separate properly from each other. Gametes having an abnormal number of chromosomes could be due to nondisjunction in either meiosis I or meiosis II. 

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Problem Details

If a cell has a diploid number of 10 (2n=10), how many chromosomes will be in each of the four daughter cells if one pair of the chromosomes experiences nondisjunction during meiosis I?

A. There will be two cells with 5 chromosomes and two cells without any chromosomes.

B. There will be two cells with 5 chromosomes, one cell with 6 chromosomes, and one cell with 4 chromosomes.

C. There will be two cells with 10 chromosomes and two cells without any chromosomes.

D. All four cells will have 5 chromosomes.

E. There will be two cells with 4 chromosomes and two cells with 6 chromosomes.

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Based on our data, we think this problem is relevant for Professor Pravosudova's class at UNR.