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Yes, some animals do have chromosome 21.
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∙ 11y ago
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Is the smallest gene cell chromosome?
Chromosome 21 is the smallest human chromosome. Inside of the chromosome, there are 48 billion nucleotides, the building blocks of DNA.
Defect on chromosome 21 where a third chromosome is present what is this defect called?
This is trisomy 21 i.e. Downs syndrome
Gene A occurs on chromosome 5 gene B on chromosome 21 Therefore these two parts of a chromosome cannot be what?
alleles
What is trisomy mutation?
A trisomy is when a person has 3 versions of a chromosome. 'Normal' humans will only have 2 of each chromosome. For example, having 3 versions of chromosome 21 is known as Trisomy 21 or Down Syndrome.
Autosomal abnormality resulting in three copies of chromosome 21 is known as?
Trisomey-21
What chromosome is associated with Downs?
Chromosome 21.
What gene or chromosome is affected by down syndrome?
Chromosome 21 is tripled in Down syndrome.
Is the smallest gene cell chromosome?
Chromosome 21 is the smallest human chromosome. Inside of the chromosome, there are 48 billion nucleotides, the building blocks of DNA.
How many autosomes?
21 autosomes becasue chromosome 21 has three chromosomes and chromosome 23 is the sex chromosome - the allosome
Down syndrome is usually caused by an extra copy of what chromosome?
Down syndrome occurs because of the extra chromosome on chromosome 21. If you go onto google images and type in karyotype of Down syndrome, you will find a picture of the extra chromosome. Instead of having two chromosomes on chromosome 21, there is an extra. Type your answer here...
Is Down syndrome a genetic disorder or a chromosome disorder?
Down syndrome is a chromosomal disorder. It is caused by having 1 extra chromosome (chromosome 21).
Which chromosome is down symptoms found?
21 st chromosome it is also call Trisomy 21 because the 21st chromosome has three instead of the normal two.
Defect on chromosome 21 where a third chromosome is present what is this defect called?
This is trisomy 21 i.e. Downs syndrome
What does the karyotype of a person with down syndrome show?
A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
Gene A occurs on chromosome 5 gene B on chromosome 21 Therefore these two parts of a chromosome cannot be what?
alleles
What chromosome number is affected by alzheimer's disease?
Chromosome numbers: 1, 14, 19, and 21 are affected by Alzheimer's disease.
A person with Down syndrome has what type of chromosome abnormality?
Is caused by an extra number 21 chromosome.
