Skip to main content

What is the ending number of chromosomes in meiosis?

Meiosis is a reduction division that produces haploid (n) gametes with half the chromosomes as seen in a diploid (2n) body cell. Meiosis occurs in the gonads or sex organs and produces gametes or sex cells. In sexually reproducing organisms, it is the fusion of the sperm nucleus which is haploid and the egg nucleus which is also haploid that will produce a diploid fertilized egg or zygote.


To observe an example of the ending...

Meiosis is a reduction division that produces haploid (n) gametes with half the chromosomes as seen in a diploid (2n) body cell. Meiosis occurs in the gonads or sex organs and produces gametes or sex cells. In sexually reproducing organisms, it is the fusion of the sperm nucleus which is haploid and the egg nucleus which is also haploid that will produce a diploid fertilized egg or zygote.


To observe an example of the ending number of chromosomes after meiosis we can use the chromosome number of 46 which is the diploid number found in human body cells. After meiosis occurs in the male or female gonads, the resulting four cells will be haploid and have 23 chromosomes each.


In spermatogenesis, one testis cell gives rise to four haploid sperm cells with 23 chromosomes in each. In oogenesis, one ovary cell gives rise to one ovum with 23 chromosomes, and three polar bodies, each with 23 chromosomes.


To conclude, meiotic division results in cells with the haploid number of chromosomes which become gametes to be used during sexual reproduction.


I have included a link with a diagram comparing oogenesis and spermatogenesis.

Comments

Post a Comment

Popular posts from this blog

What is the meaning of "juggling fiends" in Macbeth?

Macbeth is beginning to realize that the three witches have been deceiving him since he first encountered them. Like jugglers, they have kept changing their forecasts in order create confusion. This is particularly apparent when the Second Apparition they raise in Act IV,   Scene 1 tells him that no man of woman born can overcome him in hand-to-hand battle--and then Macbeth finds himself confronted by the one man he has been avoiding out of a... Macbeth is beginning to realize that the three witches have been deceiving him since he first encountered them. Like jugglers, they have kept changing their forecasts in order create confusion. This is particularly apparent when the Second Apparition they raise in Act IV,   Scene 1 tells him that no man of woman born can overcome him in hand-to-hand battle--and then Macbeth finds himself confronted by the one man he has been avoiding out of a sense of guilt, and that man tells him: Despair thy charm. And let the angel whom thou still hast serve...
Post a Comment
Read more

Why did Tybalt attack and kill Mercutio instead of Romeo, who he had originally been targeting?

Though Tybalt's quarrel is with Romeo, he begins the momentous duel in Act 3 by fighting with and killing Mercutio instead. Tybalt ultimately attacks Mercutio because the garrulous and hot-headed character insults Tybalt and goads him into a duel to protect Romeo's honor. From the beginning of the encounter in Act 3, Scene 1, it's clear that Mercutio is itching for a fight. For instance, when Tybalt signals that he wants to talk to Mercutio... Though Tybalt's quarrel is with Romeo, he begins the momentous duel in Act 3 by fighting with and killing Mercutio instead. Tybalt ultimately attacks Mercutio because the garrulous and hot-headed character insults Tybalt and goads him into a duel to protect Romeo's honor. From the beginning of the encounter in Act 3, Scene 1, it's clear that Mercutio is itching for a fight. For instance, when Tybalt signals that he wants to talk to Mercutio and Benvolio, Mercutio responds "And but one word with one of us?/ Couple it w...
Post a Comment
Read more

Follow the relationship between Pi and Richard Parker. They endure over two hundred days of hardship together, but in the end Richard Parker leaves...

When Pi and Richard Parker are at the beginning of their journey, after Pi's family is killed in the shipwreck, Pi fears Richard Parker, but he is forced to find a way to co-exist with him in order to survive.  Over time the two develop a somewhat co-dependent relationship.  Richard Parker depends on Pi to feed him by catching fish, while Pi's will to live is bolstered by Richard Parker's presence.  Richard Parker recognizes that... When Pi and Richard Parker are at the beginning of their journey, after Pi's family is killed in the shipwreck, Pi fears Richard Parker, but he is forced to find a way to co-exist with him in order to survive.  Over time the two develop a somewhat co-dependent relationship.  Richard Parker depends on Pi to feed him by catching fish, while Pi's will to live is bolstered by Richard Parker's presence.  Richard Parker recognizes that he also needs Pi to survive.  At one point in the book, Pi's starvation and thirst reduce him to a st...
Post a Comment
Read more