Biology 9-1 0970: Inheritance Topical Past Paper Questions

Pea plants produce seeds in pods. The colour of pea pods is controlled by a single gene. Some pea pods are green and some are yellow. The allele for green is dominant and is represented by the letter G. The allele for yellow is recessive and is represented by the letter g. (a) De…

Fig. 5.1 is a pedigree diagram showing the inheritance of blood group in one family. Fig. 5.1 (a) State the number of people in Fig. 5.1 with: XY chromosomes ..... only one I $ ^{A} $ allele. (b) Explain how Fig. 5.1 shows that blood group is an example of discontinuous variation…

Fig. 2.1 is a diagram of part of a DNA molecule. Fig. 2.1 (a) Draw a circle on Fig. 2.1 to identify one pair of bases. [1] (b) The percentage of T bases in the DNA of a species is 29%. Calculate the percentage of bases that would be base G in the DNA of this species. Space for wo…