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Recessive Traits

Let Y be the ...

Question

Let Y be the genotypic symbol for dominant yellow seed colour, symbol y for recessive green seed colour, symbol R for dominant round shape of seed and symbol r for recessive wrinkled seed shape in garden pea. Using these symbols explain the Mendels law of independent assortment.

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Solution

According to the law of independent assortment, when two or more characteristics are inherited, individual hereditary factors assort independently during gamete production, giving different traits an equal opportunity of occurring together.

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Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive :

(a) Yellow seed, green seed (b) Round seed, wrinkled seed

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