EXERCISE 3.2 (The principles and mechanism of inheritance)

1. Dominant genes are genes that show their effects wherever they are present.

2. Recessive genes are genes that only show their effects in the absence of dominant genes.


3. Find the words in the puzzle that describe the traits given below:


a) The ability to roll the tongue
b) The type of ear lobes
c) The types of hair
d) The way of using hand


Use blue pen to mark the dominant traits and black pen/pencil to mark the recessive trait.