In the sweet pea plant, Lathyrus odoratus, one gene codes for flower colour and one gene codes for pollen grain shape. Flower colour is either purple or red. Pollen grain shape is either long or round. The inheritance of these genes is an example of autosomal linkage. • The allele F for purple flowers is dominant over the allele f for red flowers. • The allele G for long pollen grains is dominant over allele g for round pollen grains.

Flowers of the common morning-glory plant, Ipomoea purpurea, can have several different phenotypes. An example of the...

Fig. 7.1 shows two chromosomes in one stage of meiosis. The letters G to M represent the dominant alleles of seven ge...

The red blood cells of people with sickle cell anaemia have reduced oxygen-carrying capacity.

What name is given to all the organisms in an area and their interactions with their environment?

What is the function of nitrifying bacteria in the soil?

Which range of sizes would include most eukaryotic cells?