Answer+1

methods could be used to produce a population of cats with the short legs. (i) Selective breeding  E 1 : bases explanation on the assumption that the mutated allele is dominant.  E 2 : breed short-legged offspring together or  with mother.  E 3 : any short-legged offspring will be either heterozygous or homozygous dominant.  E 4 : to find out what they are, carry out a test cross ie breed with another normal cat (homozygous recessive).  E 5 : if no normal size legs offspring occur (after multiple breedings), then it can be taken that the tested individual is homozygous for short legs. This cat can be used for future breeding. / Any cat that produces offspring with normal legs is heterozygous and shouldn’t be used for future breeding. (ii) Molecular Biology  Transgenesis: pro-nuclear injection of   isolated gene into fertilised egg cell, cell divides to form embryo, then embryo implanted into surrogate. OR  Cloning: Somatic (ie 2N) cell from original female cat removed (nucleus has mutated  allele), fertilised egg extracted from another cat, nucleus removed, and egg fused with donor cell/nucleus (electrical pulse used to stimulate this), egg divides to form embryo, then embryo implanted into surrogate. || 6. Covers both selective breeding and one molecular biology technique. Explains correctly and fully how the methods can be used to produce a population of Munchkins. Minimal unnecessary information. 5. Correct and full explanation for one method, the other is substantially correct but lacks some details. 4 . Both methods, substantially correct but lacking in   coverage. Selective breeding must have E 1. 3. Addressed both methods but issues with accuracy and/or coverage. Selective breeding must have E 1. /  One method well covered and correct, other hopeless (but has 1 or 2 correct ideas). 2. Some correct evidence for both methods. / Only one method answered but answered correctly and in detail. 1. Some correct biological ideas relevant to the question. ||
 * || **Evidence **  ||  **Judgement **  ||
 * 1a || Explains how selective breeding and molecular biology