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15 Cards in this Set
- Front
- Back
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difference between hemizygous and monosomic |
hemizyg - single copy of a gene monosomic - single copy of a chromosome |
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what happens in deletion |
breakage causes a chromosome to become defficient |
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a person that has 2 or more types of different cells |
MOSAIC |
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x linked recessive are more common in male or female |
male |
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tell me about deactivatoin of a barr body, what happens?
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its random, adult cells could be a MOSAIC if a female was a heterozygote for an x linked gene |
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where does nondisjucntion occur |
for homologous chromosomes, anaphase 1 meiosis 1... and for sister chromatids, it happens in mitosis or anaphase ii or mieosis ii |
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nondysjunction causes |
aneupliody, incorrect chromosome #s |
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word that refers to having extra ENTIRE sets of chromosomes |
polyploidy |
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aneupliody results in |
misscarriage or SEVERE defects (early death) |
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this is lethal in humans except for the X chromosome |
monosomy |
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non disjunction of the sex chromosomes results in |
viable kids with phenotypic effects |
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the only thing non viable is |
males missing the X - OY |
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mistakes in crossing over cause |
chromosme structure to be messed up |
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mistakes in crossing over happen in many genes |
true |
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what are the effects of having mistakes during crossing over |
deletion, duplication, inversion, and translocation |
