Q6 of 19 Page 93

Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

The phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus, say height, is as follows:


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4

Explain the Law of Dominance using a monohybrid cross.

 5

Define and design a test-cross.

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When a cross in made between tall plants with yellow seeds (TtYy) and tall plants with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be

(A) Tall and green.


(B) Dwarf and green.

 8

Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in F1 generation for a dihybrid cross?