Inheritance and genetics – practice for Year 9

Sample questions on Inheritance and genetics with the right answer and a worked solution, from easy to hard. In the Pickles Academy app a child gets new questions of the same kind every time, so they can't just learn the answers by heart.

Subject

Biology

Year

Year 9

Curriculum area

General biology and genetics

Question types: Inheritance YES/NO

Sample questions

1. Question 1 Easy

   Decide whether each statement is true (YES) or not (NO).

   1. Gregor Mendel, who did experiments with pea plants, is called the father of genetics.
   2. A mutation is a change in the genetic information.
   3. A child inherits the muscles its parents built up by training.
   Show the solution

   Answer:

   1. Gregor Mendel, who did experiments with pea plants, is called the father of genetics. – yes
   2. A mutation is a change in the genetic information. – yes
   3. A child inherits the muscles its parents built up by training. – no

   How it works: 1. YES 2. YES 3. NO – acquired characteristics are not inherited

2. Question 2 Normal

   Decide whether each statement is true (YES) or not (NO).

   1. Identical twins have practically the same genetic information.
   2. A human body cell has 46 chromosomes.
   3. A baby’s sex is decided by the sex chromosome in the sperm.
   4. A gene is a section of DNA that carries the information for a characteristic.
   Show the solution

   Answer:

   1. Identical twins have practically the same genetic information. – yes
   2. A human body cell has 46 chromosomes. – yes
   3. A baby’s sex is decided by the sex chromosome in the sperm. – yes
   4. A gene is a section of DNA that carries the information for a characteristic. – yes

   How it works: 1. YES 2. YES 3. YES 4. YES

3. Question 3 Hard

   Decide whether each statement is true (YES) or not (NO).

   1. A recessive allele shows even when a dominant allele is present.
   2. Human sex cells (egg and sperm) have 23 chromosomes.
   3. Blood group is inherited.
   4. Down syndrome is caused by an extra copy of chromosome 21.
   5. Females have the sex chromosomes XY and males XX.
   Show the solution

   Answer:

   1. A recessive allele shows even when a dominant allele is present. – no
   2. Human sex cells (egg and sperm) have 23 chromosomes. – yes
   3. Blood group is inherited. – yes
   4. Down syndrome is caused by an extra copy of chromosome 21. – yes
   5. Females have the sex chromosomes XY and males XX. – no

   How it works: 1. NO – the dominant allele masks the recessive one 2. YES 3. YES 4. YES 5. NO – females are XX, males XY

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