Banding: Different extents of chromatin condensation.

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extents of chromatin condensation
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Transcript of Banding: Different extents of chromatin condensation.

Page 1: Banding: Different extents of chromatin condensation.

Banding: Different extents of chromatin condensation

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Allele names according to phenotype

Wild type

amorph

hypomorph

hypermorph

RR

RR

neomorph

R~

R~R~

R~

NULL

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Standard Dominant – Recessive

Haploinsufficiency

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Lyse Cell and its Nucleus

Human Karyotype – Trisomy 21

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disjunctionnon-אי -הפרדההפרדת – כרומ.

junctionחיבור

אי-הפרדה

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Non-disjunction in Meiosis I: Animation 18.1a

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Non-disjunction in Meiosis II: Animation 18.1b

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Down

Patau

Edwards

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Animation 17.2b

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Monosomy:

Karyotype minus 1 chromosome homolog

חסר עותק )הומולוג( אחד של כרומוזום

Nullisomy:

Karyotype minus both chromosome’s homologs

שני העותקים )הומולוגים( של כרומוזום אחד חסרים

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X

Y

X

Y

X+Y

X+Y

X+X

Y

Y

An example:In males

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X1

X2

X1+X2

X1+X2

X1 + X1

An example:In females

X1

X2

X2

X2

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XXY - Kleinfeldter

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XO - Turner

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Sex-linked anhidrotic ectodermal dysplasia( absence of sweat glands in blue areas)

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XXX, XXY, XXYY

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2n 4n

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כרוב

צנון

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Nullisomics of modern (hexaploid) wheat

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