Integrated Science

1A cross between Tt and tt gives tall offspring in the ratio

2Two parents with genotype Tt (T = tall, dominant) are crossed. What fraction of the offspring is expected to be short (tt)?

3An organism's observable characteristics, such as height or eye colour, make up its

4A gene is

5In humans, the sex chromosomes of a male are

6Two parents with sickle cell trait (AS) have a child. The probability the child is AS is

7An allele that is always expressed when present is

8The probability that a baby will be a boy is

9The passing of traits from parents to their offspring is called

10A gene that shows its effect even when only one copy is present is