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Meiotic nondisjunction. In meiosis I or II, chromosome pair 21 fail to separate correctly, leaving one gamete with an extra chromosome 21.

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How many chromosomes would be in a zygote if the bird has 30 chromosomes?

A zygote is a fertilized egg cell, so it is diploid and thus has a full set of DNA. If the adult has 30 pairs of chromosomes, the zygote would have 30 pairs. If there are 30 chromosomes, then the zygote will have 60 (30 from the mother and 30 from the father). It comes down to whether you meant individual chromosomes or pairs of chromosomes.


How many chromosomes human zygote possess?

46 23 from each parent...unless there is a mutation. Hi sorry to but in, but i was just wondering. If a human zygote contains 46 chromosomes and then total chromosomes they have is 46. Then if a mouse has 40 chromosomes would it's zygote be 40 as well? I have Biology homework and i was just wondering. Thanks!


What happens if a egg cell has 24 chromosomes and is fertilized by a sperm cell containing 23 chromosomes.?

The resulting zygote would have 47 chromosomes, which is an extra chromosome compared to the normal human chromosomal number of 46. This condition is called trisomy and can lead to genetic disorders such as Down syndrome.


How many chromosomes does the zygote have Following fertilization?

Sperm contains 23 chromosomes. An egg contains 23 chromosomes. The zygote (a fertilized egg) contains 46 chromosomes. Yet, it is also important to consider that the egg completes meiosis before joining with the sperm, thereby shedding half of its 46 chromosomes into a polar body that adjoins the zona pelucida lining.


How many chromosomes are present in an egg just produced by the ovaries?

In humans there are 23 single chromosomes. In a zygote there are 23 pairs.

Related Questions

What condition occurs when a human zygote has 47 chromosomes?

A human zygote with 47 chromosomes has a condition called trisomy, specifically trisomy 21 if the extra chromosome is chromosome 21. This results in Down syndrome, a genetic disorder characterized by intellectual disability and physical abnormalities.


How many chromosomes does a zygote have and a gamate have?

Zygote=2 Gamate=1


Where are the chromosomes in the zygote?

chromosomes are present in the nucleus of zygote.


How many chromosomes does s fruit flies zygote have?

8 chromosomes


How many chromosomes would be in a zygote if the bird has 30 chromosomes?

A zygote is a fertilized egg cell, so it is diploid and thus has a full set of DNA. If the adult has 30 pairs of chromosomes, the zygote would have 30 pairs. If there are 30 chromosomes, then the zygote will have 60 (30 from the mother and 30 from the father). It comes down to whether you meant individual chromosomes or pairs of chromosomes.


How many Chromosomes does the zygote contain?

46 I think


How many sets of chromosomes does a zygote have?

there are 23 sets


A human egg cell has 23 chromosomes. How many chromosomes will a human zygote have?

46


How can nondisjuncton result in an individual having an extra chromosome what is this called?

Yes, nondisjunction results in a germinal cell (ovum or spermatozoa) with either too many or too few chromosomes. If one of these cells joins with another to form a zygote, there may be one or more too many or too few chromosomes in the cells.


Does a zygote have double or triple the number of chromosomes that a gamete has?

A zygote has twice the amount of chromosomes as a gamete.


How many chromosomes human zygote possess?

46 23 from each parent...unless there is a mutation. Hi sorry to but in, but i was just wondering. If a human zygote contains 46 chromosomes and then total chromosomes they have is 46. Then if a mouse has 40 chromosomes would it's zygote be 40 as well? I have Biology homework and i was just wondering. Thanks!


What happens if a egg cell has 24 chromosomes and is fertilized by a sperm cell containing 23 chromosomes.?

The resulting zygote would have 47 chromosomes, which is an extra chromosome compared to the normal human chromosomal number of 46. This condition is called trisomy and can lead to genetic disorders such as Down syndrome.