HEREDITY
MULTIPLE ALLELES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Some inherited traits are dominant while other traits are recessive
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Some traits are inherited, but a pea’s appearance is determined by its environment
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Pea plants do not inherit traits from either parent
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Pea plants inherit traits from only one parent.
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Detailed explanation-1: -In 1865 Mendel delivered two long lectures that were published in 1866 as “Experiments in Plant Hybridisation.” This paper established what eventually became formalized as the Mendelian laws of inheritance: The law of independent assortment. Specific traits operate independently of one another.
Detailed explanation-2: -Mendel crossed pure lines of pea plants. Dominant traits, like purple flower colour, appeared in the first-generation hybrids (F1), whereas recessive traits, like white flower colour, were masked. However, recessive traits reappeared in second-generation (F2) pea plants in a ratio of 3:1 (dominant to recessive).
Detailed explanation-3: -In this experiment, Mendel took two pea plants of opposite traits (one short and one tall) and crossed them. He found the first generation offspring were tall and called it F1 progeny. Then he crossed F1 progeny and obtained both tall and short plants in the ratio 3:1.
Detailed explanation-4: -Mendel presented his paper, Versuche über Pflanzenhybriden ("Experiments on Plant Hybridization"), at two meetings of the Natural History Society of Brno in Moravia on 8 February and 8 March 1865. It generated a few favorable reports in local newspapers, but was ignored by the scientific community.