{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

Karyotypes

Have you ever wondered what your genetic material looks like? Scientists have been able to stain & take chromosomes from cells undergoing mitosis (usually during metaphase). They then are able to match up the chromosome pairs and view them under a light microscope. The staining marks different bands on the chromosomes allowing them to be matched up with their homologous pair. The homologous pairs are then arranged in size order from largest to smallest for pairs 1-22 (your autosomes). The 23rd pair is made up of an individual's sex chromosomes (XX for female, XY for male).

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Down syndrome is caused when there's an extra chromosome at the 21st pair, which is called a .

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Why does nondisjunction occur?

The chromosomes do not condense properly

The sister chromatids do not separate correctly

The nucleoli do not disappear

Cytokinesis does not occur properly

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Having only one of a particular chromosome is called a monosomy.

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Ɛnyɛ ampa

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What could explain a HUMAN karyotype showing 47 chromosomes?

A monosomy

A trisomy

Chromosome Abnormalities

Why does nondisjunction occur?

Having only one of a particular chromosome is called a monosomy.

What could explain a HUMAN karyotype showing 47 chromosomes?

Why does nondisjunction occur?

Having only one of a particular chromosome is called a monosomy.

What could explain a HUMAN karyotype showing 47 chromosomes?