Medical Quiz

Genes, Chromosomes and Genome Quiz


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The term ‘position 11.3’ refers to which of the following?

A. Gene loci

B. Typical Allele

C. Chromosome

D. Nucleotide Sequence


Which of the following correctly summarises the distinction between an organism’s genotype and their phenotype?

A. genotype refers to the alleles that an organism has inherited for a particular gene, while phenotype refers to all of an organism’s observable traits

B. genotype refers to any observable characteristics arising from an organism’s genome, while phenotype refers to the expression of traits based on the environment


Which of the following options correctly describes what is being shown in the following karyotype?

A. female with trisomy

B. male with tetrasomy

C. male with no visible mutations

D. female with no visible mutations


A homozygous plant with red petals (AA) mates with another homozygous plant with white petals (aa) and produces an offspring with pink petals. Based on this information, which type of dominance do the alleles for petal colour display?

A. Codominance

B. Incomplete Dominance

C. Complete Dominance


A person with delayed physical growth, possible heart defects, flattened facial profile, mild to moderate intellectual disability has

A. Klinefelter syndrome

B. Turner Syndrome

C. Down Syndrome

D. Tetrasomy X


What is the name of the part labelled V

A. homologous chromosomes

B. sister chromatids

C. centromere

D. replication

E. gene loci


What is the name of the part labelled U

A. homologous chromosomes

B. sister chromatids

C. centromere

D. replication

E. gene loci


The complementary sequence of CAT GAC AGA ACC is

A. CAT GAC AGA ACCC

B. GTA CTG TCT TGG

C. GTA CTG TCT TGA

D. CTA CTG TCT TGG


A homozygous plant with red petals (AA) mates with another homozygous plant with white petals (aa) and produces an offspring with both red and white petals. Based on this information, which type of dominance do the alleles for petal colour display?

A. Codominance

B. Incomplete Dominance

C. Complete Dominance


This Karyotype indicates that the person has

A. Klinefelter syndrome

B. Down Syndrome

C. Tetrasomy X

D. Polyploidy


Polyploidy refers to a chromosomal abnormality

A. in which an organism has more than two sets of each chromosome.

B. in which an organism has more than two copies of each chromosome.


Turner Syndrome is a

A. trisomy (2n+1)

B. tetrasomy (2n+2)

C. monosomy (2n-1)

D. polyploidy (2n+n)


People with Tetrasomy X have

A. two extra copies of the X chromosome

B. one less x chromosome

C. two X chromosomes and two Y chromosomes

D. two copies of chromosome 21


Which of the following definitions best describes an allele?

A. A particular form of a gene which biologists wish to express in an experiment.

B. The particular section of DNA responsible for the production of autosomes.

C. A particular form of a gene with a unique nucleotide sequence.


What is the name of the part labelled W

A. homologous chromosomes

B. sister chromatids

C. centromere

D. replication

E. gene loci


What is the name of the part labelled X

A. homologous chromosomes

B. sister chromatids

C. centromere

D. replication

E. gene loci


Which of the following is not true of sex-linked genes?

A. There are more genes on the X chromosome than on the Y chromosome.

B. If a male inherits a recessive allele on his X chromosome it will not be expressed in his phenotype

C. X-linked traits are less likely to be expressed in females than they are in males, as females have two copies of the X chromosome.

D. If a male carries an allele for a particular disease on his X chromosome, he will only be able to pass on that abnormal X-linked trait to his daughters.


What is the name of the part labelled Z