3.9.2 The Principles and Mechanism of Inheritance

Diagram shows the inheritance of height in humans. Gene T and gene t represent dominant and recessive gene respectively.

What percentage of their offspring in the first generation is tall?

Diagram shows the inheritance of colour in a type of flower. Gene R and gene r represent red (dominant) and white (recessive) gene respectively.

What is the ratio of the number of red young flowers to the number of white young flowers in the F₁ generation?

Diagram shows the inheritance of height in a family. Gene T and gene t represent tall (dominant) and short (recessive) gene respectively. In this case, both the parents are tall (Tt).

What is the probability of obtaining a tall child?

Which of the following shows a dominant trait?