Polydactyly

Question 1

What is polydactyly?

Answer 1

A genetic disorder which gives extra fingers/toes to those affected

Question 2

Is polydactyly caused by a dominant or recessive allele?

Answer 2

Dominant

Question 3

If polydactyly is caused by a dominant allele, what does this mean for the genotype of someone affected?

Answer 3

It only needs to have one of the dominant alleles present in order for polydactyly to show in the phenotype

Question 4

What is the genotype for someone who is unaffected by polydactyly?

Answer 4

pp

p = recessive

Question 5

What is the genotype for someone who is affected by polydactyly?

Answer 5

Pp or PP

P= dominant, p=recessive