6.1) A mutation causes a blue colour in some carp.
What is a mutation?
6.2) Suggest how a mutation could cause a different colour in carp.
6.3) Two alleles control the body colour of carp:
• brown (B)
• blue (b).
The brown allele is dominant to the blue allele.
Two carp that are heterozygous for colour are crossed and produce 2.6 × 105 offspring.
Approximately how many of the offspring are expected to be blue?
Draw a genetic diagram to explain your answer.
Give your answer in standard form. [5 marks]
Number of offspring expected to be blue = _________________________
6.4) A scientist wanted to find out whether a brown carp has the genotype BB or Bb.
Describe what genetic cross a scientist could do to determine this.