Term
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Definition
The most common error is known as nondisjunction. Nondisjunction
occurs when the homologous chromosomes do not separate during meiosis.meiosis.
This produces gametes with the wrong number of chromosomes. |
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Term
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Definition
| Down syndrome is a common disorder that results from a zygote with 47 chromosomes.People with Down syndrome have three copies of chromosome 21, instead of the normal pair. |
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Term
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Definition
Turner syndrome occurs when a female is born with only one x chromosome.females with Turner syndrome do not menstruate and cannot
reproduce. |
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Term
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Definition
Trisomic females have an extra X chromosome. Unlike Turner
syndrome females, trisomic females’ reproductive organs develop at puberty
and they can reproduce. |
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Term
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Definition
A nondisjunction disorder that occurs in males is Klinefelter syndrome.Males are born with two X chromosomes and a
Y chromosome,they cannot father children. |
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