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Number of chromosome groups at equatorial plate of metaphase I of a plant body having 2n = 50 chromosomes shall be
- a)25
- b)50
- c)100
- d)75
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Number of chromosome groups at equatorial plate of metaphase I of a pl...
**Explanation:**
During metaphase I of meiosis in a plant body with 2n = 50 chromosomes, the homologous chromosome pairs align along the equatorial plate (also known as the metaphase plate). The equatorial plate is the imaginary plane perpendicular to the spindle fibers where the chromosomes arrange during metaphase.
In this scenario, the plant body has 2n = 50 chromosomes, which means it has a diploid number of chromosomes. The diploid number represents the total number of chromosomes in a somatic cell, where n represents the haploid number of chromosomes.
To determine the number of chromosome groups at the equatorial plate during metaphase I, we need to consider the behavior of homologous chromosomes during meiosis.
- **Homologous Chromosomes:** Homologous chromosomes are paired chromosomes that carry similar genetic information. In a diploid cell, one homologous chromosome is inherited from each parent.
- **Tetrads:** During prophase I of meiosis, homologous chromosomes come together and form a structure called a tetrad (also known as a bivalent). Each tetrad consists of two homologous chromosomes, with each chromosome composed of two sister chromatids.
- **Independent Assortment:** During metaphase I, the tetrads align randomly along the equatorial plate. This random alignment is known as independent assortment, which means that the homologous chromosome pairs can arrange in various combinations.
Now, let's calculate the number of chromosome groups at the equatorial plate:
- The plant body has 2n = 50 chromosomes, which means it has a total of 50/2 = 25 homologous chromosome pairs.
- Each homologous chromosome pair forms a tetrad during prophase I.
- During metaphase I, the tetrads align at the equatorial plate.
- Since each tetrad consists of two homologous chromosomes, the number of chromosome groups at the equatorial plate is equal to the number of tetrads.
- Therefore, the number of chromosome groups at the equatorial plate is 25.
Hence, option A) 25 is the correct answer.
During metaphase I of meiosis in a plant body with 2n = 50 chromosomes, the homologous chromosome pairs align along the equatorial plate (also known as the metaphase plate). The equatorial plate is the imaginary plane perpendicular to the spindle fibers where the chromosomes arrange during metaphase.
In this scenario, the plant body has 2n = 50 chromosomes, which means it has a diploid number of chromosomes. The diploid number represents the total number of chromosomes in a somatic cell, where n represents the haploid number of chromosomes.
To determine the number of chromosome groups at the equatorial plate during metaphase I, we need to consider the behavior of homologous chromosomes during meiosis.
- **Homologous Chromosomes:** Homologous chromosomes are paired chromosomes that carry similar genetic information. In a diploid cell, one homologous chromosome is inherited from each parent.
- **Tetrads:** During prophase I of meiosis, homologous chromosomes come together and form a structure called a tetrad (also known as a bivalent). Each tetrad consists of two homologous chromosomes, with each chromosome composed of two sister chromatids.
- **Independent Assortment:** During metaphase I, the tetrads align randomly along the equatorial plate. This random alignment is known as independent assortment, which means that the homologous chromosome pairs can arrange in various combinations.
Now, let's calculate the number of chromosome groups at the equatorial plate:
- The plant body has 2n = 50 chromosomes, which means it has a total of 50/2 = 25 homologous chromosome pairs.
- Each homologous chromosome pair forms a tetrad during prophase I.
- During metaphase I, the tetrads align at the equatorial plate.
- Since each tetrad consists of two homologous chromosomes, the number of chromosome groups at the equatorial plate is equal to the number of tetrads.
- Therefore, the number of chromosome groups at the equatorial plate is 25.
Hence, option A) 25 is the correct answer.
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Community Answer
Number of chromosome groups at equatorial plate of metaphase I of a pl...
In the question they r asking for chromosome group... (i.e) they mean as HOMOLOGOUS PAIR OF CHROMOSOMES..... In metaphase 1 the chromosomes are arranged in 2 rows separating the homologous chromosomes which in anaphase 1 will be separated completely...
Hence there will be 25 groups(HOMOLOGOUS PAIRS) and 50 chromosomes..
Hence there will be 25 groups(HOMOLOGOUS PAIRS) and 50 chromosomes..
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Number of chromosome groups at equatorial plate of metaphase I of a plant body having 2n = 50 chromosomes shall bea)25b)50c)100d)75Correct answer is option 'A'. Can you explain this answer?
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