Question

Explain Mendel, s n nohybrid progeny with the help of any one cross

Answer 1

This cross is based on the first law of genetics i.e Law of Segregation. A monohybrid cross is a mating between two organisms with different variations at one genetic chromosome of interest. The character(s) being studied in a monohybrid cross are governed by two or multiple variations for a single locus. A cross between two parents possessing a pair of contrasting characters is known as monohybrid cross. To carry out such a cross, each parent is chosen to be homozygous or true breeding for a given trait (locus). When a cross satisfies the conditions for a monohybrid cross, it is usually detected by a characteristic distribution of second-generation (F2) offspring that is sometimes called the monohybrid ratio.

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Answer 2

In monohybrid progeny Mendal first crossed pure-bred tall pea plants with pure-bred dwarf pea plants and found that only tall pea plants were produced in the first generation or F1 generation. No dwarf pea plants( or short pea plants) were obtained in the first generation of progeny. From this Mendel concluded the first generation showed the traits of only one of the parent plants: tallness. The trait of other parent plant, dwarfness, did not show up in the progeny of first generation.



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