Lesson Worksheet: Chromosomal Abnormalities Biology
In this worksheet, we will practice identifying chromosomal abnormalities from a karyotype and explaining the effects of these abnormalities.
Q1:
The passage provided outlines how chromosomal abnormalities can be caused.
Chromosomal abnormalities can be caused by changes in the of chromosomes, or a complete loss or of entire chromosomes.
Which word would be most appropriate to replace the first blank?
- AAppearance
- BBonding
- CReplication
- DStructure
Which word would be most appropriate to replace the second blank?
- AFusion
- BSpecialization
- CSegmentation
- DGain
Q2:
Turner syndrome is an example of a syndrome caused by chromosomal abnormalities.
How is Turner syndrome caused?
- ATurner syndrome is caused by the gain of a complete Y chromosome.
- BTurner syndrome is caused by a large change in the structure of chromosome 13.
- CTurner syndrome is caused by the loss or change in the structure of an X chromosome.
- DTurner syndrome is caused by the loss or change in the structure of a Y chromosome.
Q3:
Klinefelter’s syndrome is an example of a syndrome caused by chromosomal abnormalities.
How is Klinefelter’s syndrome caused?
- AKlinefelter’s syndrome is caused by the presence of an extra Y chromosome in cells.
- BKlinefelter’s syndrome is caused by structural changes in chromosome 21.
- CKlinefelter’s syndrome is caused by the complete loss of an X chromosome.
- DKlinefelter’s syndrome is caused by the presence of an extra X chromosome in cells.
Q4:
Down syndrome is an example of a syndrome caused by chromosomal abnormalities.
How is Down syndrome caused?
- ADown syndrome is caused by the complete loss of chromosome 21.
- BDown syndrome is caused by having three copies of chromosome 21, rather than two.
- CDown syndrome is caused by having three copies of an X chromosome, rather than two.
- DDown syndrome is caused by structural changes to the X and Y chromosomes.
Q5:
Down syndrome is an example of a syndrome caused by chromosomal abnormalities.
Which of the following is not a common trait associated with Down syndrome?
- AIntellectual disabilities
- BDelayed development of speech
- CHeart defects
- DRapid growth during puberty
- EWeak muscle tone
Q6:
Klinefelter’s syndrome is an example of a syndrome caused by chromosomal abnormalities. Which of the following is commonly associated with Klinefelter’s syndrome?
- APartial deafness
- BMyopia
- CCervical cancer
- DInfertility
Q7:
Turner syndrome is an example of a syndrome caused by chromosomal abnormalities.
Which of the following is not a common trait associated with Turner syndrome?
- AStunted growth
- BDelayed puberty
- CSevere intellectual disabilities
- DInfertility
- ELoss of ovary function
Q8:
A case of chromosomal abnormality resulted from the fertilization of an abnormal ovum (one that has an extra copy of X chromosomes) with a normal sperm. If you know that the fertilizing sperm carries a Y chromosome, which of the following statements is correct about this case?
- AThis case is Turner’s syndrome, and the resulting individual is an abnormal female with 45 chromosomes in her somatic cells.
- BThis case is polyploidy, and the resulting individual is an abnormal female with some male physical features.
- CThis case is Down’s syndrome, and the resulting individual is an abnormal male with 45,XY karyotype.
- DThis case is Klinefelter’s syndrome, and the resulting individual is an abnormal male with 47,XXY karyotype.
Q9:
Karyotypes are images of a person’s chromosomes that can be used to determine chromosomal abnormalities.
Which syndrome is likely to be caused by the chromosomal abnormality shown in the karyotype provided?
- AKlinefelter syndrome
- BTurner syndrome
- CDown syndrome
Q10:
A karyotype is an image of a person’s chromosomes that can be used to determine chromosomal abnormalities.
Which syndrome will likely be developed as a result of the chromosomal abnormality shown in the karyotype provided?
- ADown syndrome
- BTurner syndrome
- CKlinefelter syndrome
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