Biology

1A test cross is done by crossing an organism with one that is

2Down syndrome is caused by an extra copy of chromosome

3In a cross Rr × rr, the probability that an offspring is homozygous recessive is

4A cross between two heterozygous tall plants (Tt × Tt) gives a phenotypic ratio of

5Lamarck's theory of evolution was based on

6Haemophilia is a sex-linked disorder carried on the

7The father of genetics is

8Sickle cell anaemia is an example of

9In a population, 16% show a recessive trait (aa). The frequency of allele a is

10In a dihybrid cross of two heterozygotes (AaBb × AaBb), the expected phenotypic ratio is