Yr9 Biology Genetics Pre Test

What are genes?

• Double helix

• food

• A section of DNA

• the study of genetics

A dominant trait is:

• Always expressed if present

• Aonly expressed if it is the only trait present

• 2 genes which are different

• 2 genes which are the sam

The chance of two heterozygous parents having an offspring who is homozygous recessive is:

• 0%

• 25%

• 50%

• 100%

Which of the following is an example of incomplete dominance

• The flower colour in F1 (offspring) can be either red or white when the P (parent) generation are red or white

• The flower colour in F1 (offspring) can only be white when the P (parent) generation are red or white

• The flower colour in F1 (offspring) can be red, white or pink when the P (parent) generation flowers are red or white

• The flower colour in F1 (offspring) can be any possible colour when the P (parent) generation flowers are red or white

The definition of an allele is:

• A feature of an organism that can be physical or behavioural

• A large structure of DNA nmolecules visialbe during cell division

• Alternative forms of the same gene found at the same point on a pair of chromosomes

• A specific segment of DNA providing instruction for a single trait

Mutations affect your whole body if they are inherited. What are the 3 types of effect mutations can have?

• Somatic, Nil,Harmful

• Acquired, Beneficial, Harmful

• Silent, Harmful, Beneficial

• Somatic, Acquired, Harmful

Meiosis results in:

• 2 haploid daughter cells

• 4 haploid daughter cells

• 2 diploid daughter cells

• 4 diploid daughter cells

T=tall and t=short

In the Punnett squre below, what belongs in the missing square.

• tt

• Tt

• Bb

• TT

What would be all the possible genotypes of homozygous brown fur male and homozygous white fur female.

• BB, Bb, bb

• BB, Bb

• Bb, bb

• Bb

What is the relationship between individual 2 and 9

• 2 and 9 are married

• 2 is 9's grandmother

• 9 is 2's grandmother

• 2 is 9's aunt