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How many chromosomes would each of the gametes have the would cause Downs syndrome in a zygote?
In a condition such as Trisomy 21 (predominant form of Down syndrome) embryo starts developing with three copies of chromosome 21 instead of two. It is due to the failure in the separation of two (2n) chromosome 21 in either egg or sperm cell prior to or during fertilization.
So precisely, the answer is, either one of sperm or egg gamete would have 24 chromosome (n) instead of 23
What else can I help you with?
What is an example of a disorder associated with an error in the number of chromosomes present?
Down syndrome (trisomy 21) is a disorder associated with an error in the number of chromosomes present. Other examples of disorders associated with an error in the number of chromosomes are Trisomy 18 (Edwards Syndrome), Trisomy 13 (Patau Syndrome), Triple X syndrome, and Klinefelter Syndrome.
Why is it important that gametes contain only a single set of chromosomes?
An adult cell is "diploid", it has 2 sets of each chromosome.To make a sex cell these chromosomes pairs are split in two (during mitosis) and one half of each pair goes into each gamete (the sperm in a man or an egg/ovum in a woman) which is "haploid". The "haploid" gametes therefore contain half the number of chromosomes as compared to an adult call.When a man an a woman have sex the gametes from each meet and fuse together, giving the zygote produced 2 sets of each chromosome - back to the "diploid" state. The zygote then grows into the new baby which contains half the generic code form the mother and half the genetic code form the father - a wonderful new mix.
What is nondisjunction in chromosomes and what is the result?
Nondisjunction is the failure of chromosome pairs to separate properly during cell division. This can result in an abnormal number of chromosomes in the daughter cells, which can lead to genetic disorders such as Down syndrome.
How chromosomes number remains the same in the members of same species give scientific reason?
of the formation of haploid sex cells during meiosis, which then unite to form a new diploid cell called a zygote, which will have the same number of chromosomes as the members of that species.
What can an extra chromosome do?
Having an extra chromosome, known as trisomy, can lead to genetic disorders such as Down syndrome (trisomy 21) or Edwards syndrome (trisomy 18). These disorders can affect physical and intellectual development, leading to characteristic features and health challenges. The specific impact of an extra chromosome varies depending on which chromosome is affected.
How many diploid chromosomes does a downs syndrome boy have?
47 chromosomes
Where did down syndrome come from?
Downs syndrome is a genetic abnormality caused by an extra chromosome, in simple terms - as a healthy individual you inherit 22 chromosomes from your mother and 22 from your father, so that's 44 altogether, 1 chromosome from each of your parents will combine to form 22 sets, in a person with Downs syndrome there is an extra abnormally shaped set of chromosomes. So in short a person with Downs syndrome has 23 chromosomes instead of 22.
What is an example of a disorder associated with an error in the number of chromosomes present?
Down syndrome (trisomy 21) is a disorder associated with an error in the number of chromosomes present. Other examples of disorders associated with an error in the number of chromosomes are Trisomy 18 (Edwards Syndrome), Trisomy 13 (Patau Syndrome), Triple X syndrome, and Klinefelter Syndrome.
Can dogs have Down syndrome?
Yes. The last I knew (but my information is about 15 years old), Down Syndrome is the only chromosomal deffect that they believe can affect all mammals. There are documented cases of cats, dogs, horses, and others with Down Syndrome. They believe the reason they don't see it more often is because the mother's body rejects the baby early or they just don't survive.
Why is it important that gametes contain only a single set of chromosomes?
An adult cell is "diploid", it has 2 sets of each chromosome.To make a sex cell these chromosomes pairs are split in two (during mitosis) and one half of each pair goes into each gamete (the sperm in a man or an egg/ovum in a woman) which is "haploid". The "haploid" gametes therefore contain half the number of chromosomes as compared to an adult call.When a man an a woman have sex the gametes from each meet and fuse together, giving the zygote produced 2 sets of each chromosome - back to the "diploid" state. The zygote then grows into the new baby which contains half the generic code form the mother and half the genetic code form the father - a wonderful new mix.
What is nondisjunction in chromosomes and what is the result?
Nondisjunction is the failure of chromosome pairs to separate properly during cell division. This can result in an abnormal number of chromosomes in the daughter cells, which can lead to genetic disorders such as Down syndrome.
What does downs syndrome affect?
people
How chromosomes number remains the same in the members of same species give scientific reason?
of the formation of haploid sex cells during meiosis, which then unite to form a new diploid cell called a zygote, which will have the same number of chromosomes as the members of that species.
Can down syndrome people get depressed?
Yes, people with Downs Syndrome can get depressed.
Is down syndrome found in the us?
Yes, Downs Syndrome is found in USA
Is downs syndrome a non disjunction?
A few are.
What is Downs Syndrome also called?
Trisomy 21
