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WGU - Heredity and Genetics exam with correct answers 2024

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Aneuploidy the presence of an abnormal number of chromosomes in a cell (45 or 47 for humans) Polyploidy Error in cell division or accident at fertilization *lethal Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen Brainpower Read More Triploidy when an organism has three copies of every chromsome instead of two; most triploid zygotes aw from dispermy Tetraploidy (4n) 4 sets of chromosomes; error in cell division; possible 92 chromosomes if all are duplicated Monosomy missing a copy of a chromosome; lethal; very rare in miscarriage and live births Trisomy 3 copies of a chromosome; Down syndrome is an example nondisjunction in meiosis I Homologous chromosomes do not separate properly @ anaphase 1 (all cells abnormal); 2 gametes have both chr. pairs and 2 gametes have neither pair Nondisjunction in meiosis 2 Half cells abnormal, sister chromatids fail to separate in meiosis 2 Apoptosis process of programmed cell death; cell suicide Senescence the natural physical decline brought about by aging

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WGU - Heredity and Genetics exam with
correct answers 2024



Aneuploidy - ANSWER- the presence of an abnormal number of chromosomes in
a cell (45 or 47 for humans)

Polyploidy - ANSWER- Error in cell division or accident at fertilization *lethal

Triploidy - ANSWER- when an organism has three copies of every chromsome
instead of two; most triploid zygotes aw from dispermy

Tetraploidy (4n) - ANSWER- 4 sets of chromosomes; error in cell division;
possible 92 chromosomes if all are duplicated

Monosomy - ANSWER- missing a copy of a chromosome; lethal; very rare in
miscarriage and live births

Trisomy - ANSWER- 3 copies of a chromosome; Down syndrome is an example

nondisjunction in meiosis I - ANSWER- Homologous chromosomes do not
separate properly @ anaphase 1 (all cells abnormal); 2 gametes have both chr.
pairs and 2 gametes have neither pair

Nondisjunction in meiosis 2 - ANSWER- Half cells abnormal, sister chromatids
fail to separate in meiosis 2

Apoptosis - ANSWER- process of programmed cell death; cell suicide

Senescence - ANSWER- the natural physical decline brought about by aging

Cancer - ANSWER- any malignant growth or tumor caused by abnormal and
uncontrolled cell division

genetic shift - ANSWER- Changes in allele frequency that occurs by chance from
generation to generation; effect is magnified in small populations

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