BIOL 133 - Genetics Final PSU exam
questions with correct answers
Aneuploidy - verified answers; extra or missing chromosomes
Nondisjunction - verified answers; homologs or sister chromatids are not separating to create
proper division
Trisomy 21 - verified answers; Down Syndrome, condition consisting of an extra chromosomes
Trisomy 18 - verified answers; Edwards syndrome, distinctive feature: oddly-clenched fists,
due to nondisjunction in meiosis II
Trisomy 13 - verified answers; Patau syndrome, very rare and usually do not survive to 6
months, distinctive feature: fused eyes
XO Syndrome - verified answers; Turners Syndrome, causes: females are born with only one X
chromosome, infertility, heart defects
XXX Syndrome - verified answers; female, fertile, taller than average, some learning
disabilities
XXYY Syndrome - verified answers; Likely arises due to unusual oocyte and sperm
Associated with more severe behavioral problems than Klinefelter syndrome
- AAD, obsessive compulsive disorder, learning disabilities
, Individuals are infertile
Treated with testosterone
XYY Syndrome - verified answers; Jacobs Syndrome, causes: extra Y chromosome, taller,
speech and reading disabilities
Deletions - verified answers; Refers to missing genetic segment from a chromosome, arise de
novo
Duplications - verified answers; produce extra copies of parts of a chromosome, arise de
novo, larger duplications have larger effects
Translocations - verified answers; Two homologous chromosomes exchange segments by
crossing over
Robertsonian translocation - verified answers; Translocation in which the long arms of two
acrocentric chromosomes become joined to a common centromere, resulting in a
chromosome with two long arms and usually another chromosome with two short arms.
Reciprocal translocation - verified answers; reciprocal exchange of segments between two
nonhomologous chromosomes
Inversions - verified answers; chromosome segments are rearranged in reverse orientation
Paracentric inversion - verified answers; inversion does not include centromere
questions with correct answers
Aneuploidy - verified answers; extra or missing chromosomes
Nondisjunction - verified answers; homologs or sister chromatids are not separating to create
proper division
Trisomy 21 - verified answers; Down Syndrome, condition consisting of an extra chromosomes
Trisomy 18 - verified answers; Edwards syndrome, distinctive feature: oddly-clenched fists,
due to nondisjunction in meiosis II
Trisomy 13 - verified answers; Patau syndrome, very rare and usually do not survive to 6
months, distinctive feature: fused eyes
XO Syndrome - verified answers; Turners Syndrome, causes: females are born with only one X
chromosome, infertility, heart defects
XXX Syndrome - verified answers; female, fertile, taller than average, some learning
disabilities
XXYY Syndrome - verified answers; Likely arises due to unusual oocyte and sperm
Associated with more severe behavioral problems than Klinefelter syndrome
- AAD, obsessive compulsive disorder, learning disabilities
, Individuals are infertile
Treated with testosterone
XYY Syndrome - verified answers; Jacobs Syndrome, causes: extra Y chromosome, taller,
speech and reading disabilities
Deletions - verified answers; Refers to missing genetic segment from a chromosome, arise de
novo
Duplications - verified answers; produce extra copies of parts of a chromosome, arise de
novo, larger duplications have larger effects
Translocations - verified answers; Two homologous chromosomes exchange segments by
crossing over
Robertsonian translocation - verified answers; Translocation in which the long arms of two
acrocentric chromosomes become joined to a common centromere, resulting in a
chromosome with two long arms and usually another chromosome with two short arms.
Reciprocal translocation - verified answers; reciprocal exchange of segments between two
nonhomologous chromosomes
Inversions - verified answers; chromosome segments are rearranged in reverse orientation
Paracentric inversion - verified answers; inversion does not include centromere
