Key Area 4:Genetic information

Question 1

Coat colour in hamsters is and inherited characteristic. Brown coat colour is dominant to white. Two hamsters of true breeding produced offspring.
Write the genotype for each parent?

Answer 1

Parent 1 = BB
Parent 2 = ww

Question 2

Percentage of offspring with brown coats?

Answer 2

100% because it dominant

Question 3

Percentage of offspring with white coats?

Answer 3

0% because the brown beats the white cause browns dominant and white isn’t

Question 4

What is meant by variation?

Answer 4

Variation is the difference between members of species

Question 5

What is phenotype?

Answer 5

Phenotype is the physical appearance of an individual

Question 6

What is genotype?

Answer 6

Genotype is the genes and organism has for a particular characteristic

Question 7

What is my phenotype?

Answer 7

For example eyes, I have Green eyes

Question 8

What is my genotype for my eyes?

Answer 8

It would be gg because I got green eyes and there small letters cause there not as common as brown

Question 9

How do you write the genotype of two dominant genes?

Answer 9

You would use two big letter for example my genotype for my eyes if they were dominant they would be GG

Question 10

How would you write the genotype if I had one dominant and one recessive gene?

Answer 10

Gg cause big G is the dominant cause it’s a big letter and the small g is the recessive cause it’s a small letter

Question 11

How would you write the genotype for two recessive genes?

Answer 11

gg