Long Answer Type
Short Answer TypeIn four o’clock plants, red colour (R) is incompletely dominant over white (r), thus the heterozygous has pink colour. What will be the offspring in a cross between red flower and a pink flower plant?
(ii) Red flowered plants have genotype RR and white flowered plants have genotype rr.
(iii) Pink flowers have a genotype Rr.
(iv) Red flowered plants will form gametes with R genes and pink flowers will produce two types of gametes with R gene and r gene.
(v) Arrangement of gametes in chequer board.
A man with blood group A married a woman with B group. They have a son with AB blood group and a daughter with blood group O. Work out the cross and show the possibility of such inheritance.
Long Answer TypeA homozygous tall pea plant with green seeds is crossed with a dwarf pea plant with yellow seeds.
(i) What would be the phenotype and genotype of F1.
(ii) Work out the phenotypic ratio of F2 generation with the help of a Punnet square.
Short Answer TypeHaemophilia is a sex linked recessive disorder of humans. The pedigree chart given below show the inheritance of haemophilia in one family. Study the pattern of inheritance and answer the questions given.
(a) Give all the possible genotypes of the members 4, 5 and 6 in the pedigree chart.
(b) A blood test shows that the individual 14 is a carrier of haemophilia. The member numbered 15 has recently married the member numbered 14.
What is the probability that their first child will be a haemophilic male?
Multiple Choice Questions
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