GAMETES HAVE A HAPLOID NO. OF CHROMOSOMES . GIVE REASON .
HOW MANY DAUGHTER CELLS ARE FORMED AT THE END OF MITOSIS AND MEIOSIS FROM A CELL HAVING 4 CHROMOSOMES??
NAME THE TYPE OF CELL DIVISON THAT OCCUR DURING :
1. GROWTH OF SHOOT
2. FORMATION OFPOLLEN GRAINS ...
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Hello friend!!!!
Before going to your answer let's know what is the difference between meiosis and mitosis.
Meiosis is a reductional division in which the chromosome number of the newly produced cell is half the original or parent number.
But mitoisis is an equational division in which the newly produced cell has the same number of chromosome as the original or parent cell.
Let's come back to your answer.
◆Gametes are formed because of the reductional division of cells. That is they are formed by meiosis. That's why they have half the number of chromosomes than that of the other cells. They contain only one set of each paired chromosomes. Thus are haploid.
◆At the end of mitosis always 2 daughter cells are produced with same number of chromosomes.
If a cell has 4 chromosomes, after mitosis the 2 daughter cells will have 4 chromosomes.
◆And at the end of meiosis always 4 daughter cells are produced with half the number of chromosomes.
If the cell has 4 chromosomes, after meiosis the 4 daughter cells will have 2 chromosomes.
◆ Growth of shoot is an equational division so mitosis occurs
And formation of pollen grains is a reductional division hence meiosis occurs .
HOPE IT HELPS..... :-)
Before going to your answer let's know what is the difference between meiosis and mitosis.
Meiosis is a reductional division in which the chromosome number of the newly produced cell is half the original or parent number.
But mitoisis is an equational division in which the newly produced cell has the same number of chromosome as the original or parent cell.
Let's come back to your answer.
◆Gametes are formed because of the reductional division of cells. That is they are formed by meiosis. That's why they have half the number of chromosomes than that of the other cells. They contain only one set of each paired chromosomes. Thus are haploid.
◆At the end of mitosis always 2 daughter cells are produced with same number of chromosomes.
If a cell has 4 chromosomes, after mitosis the 2 daughter cells will have 4 chromosomes.
◆And at the end of meiosis always 4 daughter cells are produced with half the number of chromosomes.
If the cell has 4 chromosomes, after meiosis the 4 daughter cells will have 2 chromosomes.
◆ Growth of shoot is an equational division so mitosis occurs
And formation of pollen grains is a reductional division hence meiosis occurs .
HOPE IT HELPS..... :-)
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