The discovery of chromosome banding in eukaryotes has greatly improved our ability to distinguish various cytogenetic events. Particularly useful are “banding" polymorphisms because the "morphs" can be used as chromosome markers. (These morphs are forms of chromosome that are cytologically distinguishable by virtue of minor variations in band size, position, etc). Let's çonsider chromosome 21 in humans. Assume that one set of parents are: 21 21° (female) x 21°21° (male), vhere a, b, c and d represent “morphs" of a polymorphism for this chromosome. n each case: State the genetic term for the condition (if possible), diagram the event(s) that gave ise to the condition and state in which individual the event(s) took place

Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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11. The discovery of chromosome banding in eukaryotes has greatly improved our ability to distinguish
various cytogenetic events. Particularly useful are “banding" polymorphisms because the "morphs"
can be used as chromosome markers. (These morphs are forms of chromosome that are
cytologically distinguishable by virtue of minor variations in band size, position, etc). Let's consider
chromosome 21 in humans. Assume that one set of parents are: 21°21° (female) x 21°21° (male),
where a, b, c and d represent "morphs" of a polymorphism for this chromosome.
а,
In each case: State the genetic term for the condition (if possible), diagram the event(s) that gave
rise to the condition, and state in which individual the event(s) took place.
e. 42A + 21a21c + XYY
dad MII
Interphase [show condensed]:
Interphase [show condensed]:
Diagram
meiosis for After DNA replication:
After DNA replication:
sex
chromosomes
in Mom (left) After Meiosis I:
and Dad (right)
After Meiosis I:
Gametes:
Gametes:
XҮҮ
Transcribed Image Text:11. The discovery of chromosome banding in eukaryotes has greatly improved our ability to distinguish various cytogenetic events. Particularly useful are “banding" polymorphisms because the "morphs" can be used as chromosome markers. (These morphs are forms of chromosome that are cytologically distinguishable by virtue of minor variations in band size, position, etc). Let's consider chromosome 21 in humans. Assume that one set of parents are: 21°21° (female) x 21°21° (male), where a, b, c and d represent "morphs" of a polymorphism for this chromosome. а, In each case: State the genetic term for the condition (if possible), diagram the event(s) that gave rise to the condition, and state in which individual the event(s) took place. e. 42A + 21a21c + XYY dad MII Interphase [show condensed]: Interphase [show condensed]: Diagram meiosis for After DNA replication: After DNA replication: sex chromosomes in Mom (left) After Meiosis I: and Dad (right) After Meiosis I: Gametes: Gametes: XҮҮ
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