In this Punnett square the top row shows the female alleles and the left-hand column shows the male alleles. The probability of the offspring being Aa is 50%. The probability of the offspring being aa ...

Genetic inheritance Carrying out a genetic cross Use probability, direct proportion and ratios Sex determination in humans Understanding of genetics including Mendel's work A quarter of the offspring ...

This milestone, combined with advances in third-generation sequencing technologies, is poised to transform our understanding of the genetic basis of digestive problems and pave the way for more ...