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 a common trait 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:

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

Q9:

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

Q10:

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
  • BDown syndrome
  • CTurner syndrome

This lesson includes 18 additional questions for subscribers.

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