MCQ-4: Inheritance

In an animal, the allele for straight fur is dominant to the allele for curly fur.
A pair of these animals mate and have nine offspring with straight fur and three with curly fur.
F represents the allele for straight fur and f represents the allele for curly fur.
What are the most likely genotypes of the parents?

What defines a diploid nucleus?

A plant has two different alleles of a gene resulting in it having a green seed.
Which row describes the phenotype and genotype of the seeds of this plant?

The shape of a person’s earlobes is determined by a single gene. This gene has dominant and recessive alleles.
The allele for detached earlobes is dominant to the allele for attached earlobes.
The diagram shows the inheritance of earlobe shape in a family.

What is the probability of the next child from the same parents having detached earlobes?

Which sex chromosomes are present in all mature human sperm cells?

The diagram shows a plant that is producing small plantlets.

Which statement about the plantlets is correct?

Which statement about the human sex chromosomes is correct?

What results from meiosis of a diploid cell?

What will be the genotypes of the offspring resulting from a genetic cross between two individuals, one of which is homozygous dominant, (TT), and the other heterozygous?

One parent has blood group A and the other parent has blood group B.
Their first child has blood group O.
What are the possible blood groups of their next child?

Hb^A is the allele for normal haemoglobin and HbS is the allele for abnormal haemoglobin that causes sickle-shaped red blood cells.
Which row correctly matches a genotype to its phenotype?

Which combination of chromosomes from egg and sperm cells will produce a boy?

What happens in meiosis?

What is the inheritance of colour blindness an example of?

In some mammals the allele for brown coat colour is dominant to the allele for white coat colour.
Which percentage of offspring will be white if a cross is made between two heterozygous mammals?

Which term is defined as a length of DNA that codes for a protein?

The following are involved in protein synthesis.

1. amino acids assembled in order
2. mRNA moves to the cytoplasm
3. mRNA passing through a ribosome
4. DNA in the nucleus

In which order do they become involved when proteins are made?

In some plants, H is the dominant allele for hairy stems and h is the recessive allele for smooth stems.
A pair of these plants produce 37 offspring, 18 with hairy stems and 19 with smooth stems.
What are the most likely genotypes of the parents?

The family tree shows the inheritance of the ability to smell flowers called freesias. The allele for the ability to smell freesias is dominant.
Which individual’s symbol is not correct?

The diagram shows a cell from an organism at the end of meiosis.

What is the diploid number for cells from this organism?