Genetics and Inheritance

Question 1

To recap state the structure of a flower?

Answer 1

Question 2

What is an allele?

Answer 2

• A version of a gene

Question 3

What does homozygous mean?

Answer 3

• Both contain the same allele (tt and TT)

Question 4

What is a dominant allele?

Answer 4

• A dominant allele only needs one allele present to be expressed

Question 5

What is a recessive allele?

Answer 5

• Recessive allele needs two alleles to be present to be expressed

Question 6

What is heterozygous?

Answer 6

• Both contain the one of each allele (Tt and Tt)

Question 7

How do you draw a punnet square?

Answer 7

Question 8

What to remember when doing a punnet square?

Answer 8

• One letter to represent gene
• Use upper case letter for dominant allele
• Use lower case letter for recessive allele
• Leave answer as a fraction or a percentage

Question 9

State how to work out codominance using a punett square?

Answer 9

Question 10

What do we call a diagram that determines the probability of inheriting a genetic disease?

Answer 10

• Pedigree diagram