Solved 2020 Question Paper ICSE Class 10 Biology — Question 11
Back to all questionsA homozygous dominant tall pea plant bearing red flowers (TTRR) is crossed with a homozygous recessive dwarf pea plant bearing white flowers (ttrr).
(i) What is the phenotype and genotype of F1 individuals?
(ii) Write the possible combination of gametes that are obtained when two F1 hybrid plants are crossed.
(iii) Mention the phenotypic ratio of the F2 generation.
(iv) State Mendel's Law of Independent Assortment.
(v) Name two X-linked disorders found in humans.
(i) Phenotype - All plants will be Tall and will bear red flowers.
Genotype - TtRr
(ii) TR, Tr, tR, tr
(iii) 9:3:3:1
(iv) Law of Independent Assortment, states that when there are two pairs of contrasting characters, the distribution of the members of one pair into the gametes is independent of the distribution of the other pair.
(v) Colour-blindness and Haemophilia