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Solution - Deviations from Mendelism - Incomplete Dominance, Co-dominance, Multiple Alleles and Inheritance of Blood Groups, Pleiotropy

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Question

What is a test cross? How can it decipher the heterozygosity of a plant?

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Why the ratio in pleiotropy is 2 : 1? Explain it with example.

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A cross used to verify the unknown genotype of FI hybrid is a_______________

  1. test
  2. back
  3. dihybrid
  4. monohybrid
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Mendel selected the garden pea plants for his experiments. Explain

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(a) Why is human ABO blood group gene considered a good example of multiple alleles?

(b) Work out a cross up to F1 generation only, between a mother with blood group A (Homozygous) and the father with blood group B (Homozygous). Explain the pattern of inheritance exhibited.

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(i) The phenotypic ratio of incomplete dominance is _____________.

(a) 2 : 1

(b) 1 : 2 : 1

(c) 1 : 1 : 1

(d) 1 : 1 : 2

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