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What is the end result difference between mitosis and meiosis?
Mitosis results in two genetically identical daughter cells, each with the same number of chromosomes as the original cell. Meiosis, on the other hand, results in four genetically different daughter cells, each with half the number of chromosomes as the original cell.
If a parent cell has 20 chromosomes how many chromosomes will be the result of meiosis?
Meiosis results in cells with half the number of chromosomes as the parent cell. Therefore, if a parent cell has 20 chromosomes, the result of meiosis will be cells with 10 chromosomes.
How can nondisjunction in meiosis result in a diploid gamete?
If all of the chromosomes fail to separate in meiosis, then nondisjunction can result in a diploid gamete. This is a type of chromosomal mutation. In animals, a zygote produced from the union of a mutated diploid gamete and a normal haploid gamete will have triploidy, which is lethal. In plants, this is not necessarily lethal.
If a cell of an organism has 46 chromosomes before meiosis how many chromosomes will exist in each nucleus after meiosis?
After meiosis in a cell that originally has 46 chromosomes, each resulting nucleus will have 23 chromosomes. This is due to the process of meiosis, which involves two rounds of cell division that result in the formation of four daughter cells, each with half the number of chromosomes as the original cell.
Do sex chromosomes crossover during meiosis?
Yes, sex chromosomes can undergo crossover during meiosis, which is the process of genetic recombination that occurs during the formation of gametes. This can result in the exchange of genetic material between homologous chromosomes, leading to genetic diversity in offspring.
What is the end result difference between mitosis and meiosis?
Mitosis results in two genetically identical daughter cells, each with the same number of chromosomes as the original cell. Meiosis, on the other hand, results in four genetically different daughter cells, each with half the number of chromosomes as the original cell.
How many chromosomes are present when meiosis starts?
In humans, 46 chromosomes are present when meiosis begins. The four daughter cells that result from meiosis have 23 chromosomes.
How many chromosomes are present when meiosis is started?
In humans, 46 chromosomes are present when meiosis begins. The four daughter cells that result from meiosis have 23 chromosomes.
If a parent cell has 20 chromosomes how many chromosomes will be the result of meiosis?
Meiosis results in cells with half the number of chromosomes as the parent cell. Therefore, if a parent cell has 20 chromosomes, the result of meiosis will be cells with 10 chromosomes.
Why do gametes have n numbers of chromosomes but not 2n?
Gametes are produced by the type of cell division called meiosis. During meiosis the number of chromosomes are halved. So if a cell starts off with 2n chromosomes and divides by meiosis the new cells will end up with n chromosomes.
How can nondisjunction in meiosis result in a diploid gamete?
If all of the chromosomes fail to separate in meiosis, then nondisjunction can result in a diploid gamete. This is a type of chromosomal mutation. In animals, a zygote produced from the union of a mutated diploid gamete and a normal haploid gamete will have triploidy, which is lethal. In plants, this is not necessarily lethal.
If a cell of an organism has 46 chromosomes before meiosis how many chromosomes will exist in each nucleus after meiosis?
After meiosis in a cell that originally has 46 chromosomes, each resulting nucleus will have 23 chromosomes. This is due to the process of meiosis, which involves two rounds of cell division that result in the formation of four daughter cells, each with half the number of chromosomes as the original cell.
During meiosis the chromosome number does what?
During meiosis, the chromosome number decreases by half. For example, if a human cell with 46 chromosomes were to undergo meiosis, the result would be four daughter cells with 23 chromosomes in each.
Do offspring that result from meiosis have twice as many chromosomes as their parents?
No, offspring resulting from meiosis have half the number of chromosomes as their parents. Meiosis involves two rounds of cell division that result in cells with half the original number of chromosomes. When two gametes combine during fertilization, the resulting offspring will have a complete set of chromosomes.
What are the main differences between meiosis 1 and 2?
meiosis 1 the result is 2 different cells with diploid (or duplicated haploids) chromosomes and for meiosis 2, the result is 4 different haploid cells
What is a failure of homologous chromosomes to separate in meiosis?
A failure of homologous chromosomes to separate in meiosis is called nondisjunction. This can result in cells with an abnormal number of chromosomes, leading to genetic disorders such as Down syndrome. Nondisjunction can occur during either the first or second division of meiosis.
Failuare of homologous chromosomes to separate properly during meiosis result in gametes with too many or too few chromosomes?
nondisjunction
