MCQ-2: Inheritance

What are correct descriptions of mitosis and meiosis?

A man has three sons.
What is the chance of his next child being a son?

The diagram shows a cross between heterozygous tall pea plants.

Which statement is not correct?

The bar chart shows the heights of pea plants grown from 500 pea seeds.

What variation do the plants show?

In the inheritance of ABO blood groups, when two parents have the genotypes I^AI^A and I^AI^o, what is the blood group of their offspring?

Which structure will be found in the nucleus of a body cell in a woman?

When a cell divides, these events occur.

1.  The DNA inside the cell is duplicated exactly.
2.  Daughter cells are produced with the same chromosome number as the parent cell.

Which type of division has occurred?

Dianthus flowers can be one of three different colours: red, pink or white.
A red flower is always homozygous and a white flower is always homozygous. Pink flowers are heterozygous.
If a red and a white flower are crossed, what percentage of the offspring will be pink?

An alligator has 32 chromosomes in each of the cells of its nose.
How many chromosomes will an alligator zygote contain?

What are stem cells?

The list shows the diploid number of chromosomes of four organisms.

• fruit fly           8
• human          46
• potato           48
• garden pea   14

What is the correct chromosome number of a male sex cell in each of these organisms?

Which row correctly shows whether the nuclei of the cells are diploid or haploid?

Cell division by meiosis of a parent cell with 23 pairs of chromosomes will result in

Colour blindness is a condition that occurs more frequently in men than in women.
Which statement about this condition is correct?

Four of the processes involved in the production of a protein are shown.

1.  mRNA attaches to a ribosome.
2.  mRNA moves to the cytoplasm.
3.  The ribosome assembles amino acids into a protein molecule.
4.  An mRNA copy of the gene is made.

In which sequence do these events normally occur?

Which statement about the sex chromosomes is correct?

The diagram shows the chromosomes in the nucleus of a body cell in an adult fruit fly.

What are the diploid and haploid number of chromosomes in the fruit fly?

The diagram shows the phenotypes for blood groups in a family.

Which statement about the genotypes of the parents is correct?

Sickle-cell anaemia is a genetic disorder which results in severe illness in homozygous individuals. In some human populations being heterozygous can be beneficial.
What could be the reason for this?

The mitotic index of a tissue is the percentage of cells in a tissue that are undergoing division.
The table shows the number of cells in two tissue samples, X and Y.

Which statement is correct?