HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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were pure-breeding
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appeared only in the first generation of a cross between two pure-breeding plants expressing contrasting forms of a trait
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disappeared after the second generation
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could be produced only if one of the parents expressed the recessive trait
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Detailed explanation-1: -Answer and Explanation: Mendel found that the organisms expressing a recessive trait is e) All of these are true statements about recessive phenotypes. Mendel observed during his experiment that dominant traits would appear in the first generation or F1 generation and recessive traits will remain disappeared.
Detailed explanation-2: -He found that some traits are dominant and would always be expressed in a first generation cross, while others are recessive and would not appear in this generation. However, these recessive traits re-appear in the next generation if these first-generation plants self-fertilise.
Detailed explanation-3: -Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units, one from each parent.
Detailed explanation-4: -Fundamental theory of heredity Mendel found that paired pea traits were either dominant or recessive. When pure-bred parent plants were cross-bred, dominant traits were always seen in the progeny, whereas recessive traits were hidden until the first-generation (F1) hybrid plants were left to self-pollinate.
Detailed explanation-5: -A true breeding line is one that has undergone self-pollination and shows a stable trait inheritance for several generations.