QCEVault

Genetics and heredity — Question 17

QCAA 2020, Paper 1 · 1 mark

Q17 · 2020 · Paper 1Unclassified1 mark

QUESTION 17

The table identifies the condition associated with a variety of ploidy changes.

Chromosome number ploidy

Condition name

Monosomy 5

Cri du chat syndrome

Trisomy 21

Down syndrome

Trisomy 23

Klinefelter syndrome

Monosomy 23

Turner syndrome

For a person with XXY sex chromosomes, which condition would they have?

(A) Cri du chat syndrome

(B) Down syndrome

(C) Klinefelter syndrome

(D) Turner syndrome

Question linkQCAA assessment resources

Related questions

  1. Q1 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 1 Which base pairs with adenine during DNA replication? (A) uracil (B) guanine (C) thymine (D) cytosine
    Genetics and heredity
  2. Q4 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 4 What is the role of tRNA in protein synthesis? (A) acting as a template strand for mRNA (B) matching amino acids to mRNA codons (C) transporting mRNA from the nucleus to the ribosome (D) providing a copy of genetic instructions for the ribosome
    Genetics and heredity
  3. Q5 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 5 Which option describes the contents of a human cell at metaphase I of meiosis? Number of chromosomes Number of copies of each gene (A) 23 1 (B) 23 2 (C) 46 2 (D) 46 4
    Genetics and heredity
  4. Q10 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 10 In humans, sex-linked recessive traits are more common in (A) males, because they have a Y chromosome. (B) females, because they have two X chromosomes. (C) males, because they have only one X chromosome. (D) females, because they do not have a Y chromosome.
    Genetics and heredity