Inheritance
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Chromosomes, genes and proteins
SubtopicChromosomes, genes and proteins under Inheritance for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of the following describes the 'genome' of an organism?
A.The physical appearance of the organism
B.The entire genetic material of that organism
C.A single pair of alleles
D.The protein structure of a cell
- 2.
If a recessive allele is represented by 'a', what is the genotype of an individual showing the recessive phenotype?
A.B.C.D. - 3.
How many strands make up a single molecule?
A.1
B.2
C.3
D.4
- 4.
Which component forms the 'backbone' of the molecule?
A.Nitrogenous bases
B.Amino acids
C.Sugar and phosphate
D.Hydrogen bonds
- 5.
If a sperm cell containing a chromosome fertilizes an egg, what will be the sex of the offspring?
A.Male
B.Female
C.Hermaphrodite
D.The sex cannot be determined from this information
- 6.
Which of the following is true about the structure of DNA?
A.Adenine always pairs with Cytosine
B.The two strands run in the same direction
C.The sides of the ladder are made of sugar and phosphate
D.The rungs of the ladder are made of amino acids
- 7.
Which process is responsible for creating genetic variation during gamete production?
A.Mitosis
B.Meiosis
C.Asexual reproduction
D.DNA replication
- 8.
If a polypeptide chain consists of the sequence Met-Ser-Gly, which of the following sequences (template strand) could have coded for it? (Met: , Ser: , Gly: )
A.B.C.D. - 9.
Which of the following occurs during the phase of the cell cycle?
A.The nuclear envelope breaks down.
B.The amount of in the cell is doubled.
C.Homologous chromosomes pair up.
D.The cell divides into two daughter cells.
- 10.
Why does a mutation in a gene for a structural protein like collagen have different phenotypic effects than a mutation in a gene for a regulatory protein?
A.Regulatory proteins are only found in the nucleus, while structural proteins are in the cytoplasm.
B.Structural proteins are not made of amino acids.
C.Regulatory proteins control the expression of many other genes, leading to widespread effects.
D.Structural proteins are not coded by .
Download the worksheet for Inheritance - Chromosomes, genes and proteins to practice offline. It includes additional chapter-level practice questions.
Mitosis and Meiosis
SubtopicMitosis and Meiosis under Inheritance for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which of these is the correct order of events in sexual reproduction?
A.Fertilization -> Meiosis -> Zygote
B.Meiosis -> Fertilization -> Zygote
C.Zygote -> Meiosis -> Fertilization
D.Mitosis -> Fertilization -> Meiosis
- 2.
In which of the following is mitosis NOT involved?
A.Growth of a human fetus
B.Repair of a broken bone
C.Production of antibodies by white blood cells
D.Production of sperm in the testes
- 3.
How many chromosomes are in a human sperm cell?
A.46
B.23
C.22
D.44
- 4.
Which of the following occurs during the 'Interphase' part of the cell cycle before division?
A.Chromosomes separate to opposite poles
B.The cell membrane pinches in two
C.DNA replication occurs
D.The nuclear envelope disappears
- 5.
At which point in the human life cycle is the diploid number restored?
A.Ovulation
B.Meiosis
C.Fertilization
D.Implantation
- 6.
Which of these is a benefit of the genetic variation produced by meiosis?
A.It allows for faster reproduction
B.It ensures all offspring are resistant to the same diseases
C.It increases the chances of a species surviving environmental changes
D.It results in fewer mutations in the population
- 7.
What is a chromatid?
A.A protein that makes up the spindle
B.One half of a replicated chromosome
C.The point where two chromosomes cross over
D.A specialized cell for reproduction
- 8.
In which stage of meiosis do the nuclear envelopes reform and the cytoplasm divides to form two haploid cells?
A.Telophase I
B.Telophase II
C.Anaphase II
D.Metaphase II
- 9.
A cell in Prophase I has amount of DNA. What is the DNA amount in a cell during Prophase II?
A.B.C.D. - 10.
Which event happens in both mitosis and meiosis?
A.Synapsis
B.Chiasmata formation
C.Disjunction of homologous chromosomes
D.Separation of sister chromatids
Download the worksheet for Inheritance - Mitosis and Meiosis to practice offline. It includes additional chapter-level practice questions.
Monohybrid inheritance
SubtopicMonohybrid inheritance under Inheritance for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
In a cross between and , what is the probability of the offspring being homozygous recessive?
A.B.C.D. - 2.
What is the genetic term for an organism that has two non-identical alleles for a gene?
A.Homozygous
B.Heterozygous
C.Pure-breeding
D.Monohybrid
- 3.
If two parents both have the genotype , what percentage of their offspring will have the genotype ?
A.B.C.D. - 4.
Which of these is the genotype for a human female?
A.B.C.D. - 5.
In pea plants, axial flowers () are dominant to terminal flowers (). If a plant with terminal flowers is crossed with a plant heterozygous for the trait, what is the phenotypic ratio of the offspring?
A.3 axial : 1 terminal
B.1 axial : 1 terminal
C.All axial
D.All terminal
- 6.
Why is it important to use a large number of offspring when determining genetic ratios?
A.To ensure all offspring survive
B.To minimize the effect of chance and get closer to the expected ratio
C.To increase the rate of mutation
D.To make the Punnett square easier to draw
- 7.
Which genotype would result in a dominant phenotype?
A.only
B.only
C.only
D.Both and
- 8.
If a cell with genotype undergoes mitosis, what will be the genotype of the two resulting daughter cells?
A.One R and one r
B.Both Rr
C.Both RR
D.Both rr
- 9.
In humans, brown eyes () are generally dominant over blue eyes (). A brown-eyed couple has a blue-eyed child. What are the genotypes of the parents?
A.BB and bb
B.Bb and Bb
C.BB and Bb
D.bb and bb
- 10.
A plant with the genotype is self-pollinated. The resulting seeds are planted. What is the probability that a randomly selected plant from the generation will produce only one type of gamete?
A.25%
B.50%
C.75%
D.100%
Download the worksheet for Inheritance - Monohybrid inheritance to practice offline. It includes additional chapter-level practice questions.