Question

explain the low of dominace using a monohybrid cross???? ​

Answer 1

Law of Dominace

Law of dominance is known as the first law of inheritance. In this law, each character is controlled by distinct units called factors, which occur in pairs. If the pairs are heterozygous, one will always dominate the other.Law of dominance explains that in a monohybrid cross between a pair of contrasting traits, only one parental character will be expressed in the F1 generation and both parental characters will be expressed in the F2 generation in the ratio 3:1.

Law of dominance is known as the first law of inheritance. In this law, each character is controlled by distinct units called factors, which occur in pairs. If the pairs are heterozygous, one will always dominate the other.Law of dominance explains that in a monohybrid cross between a pair of contrasting traits, only one parental character will be expressed in the F1 generation and both parental characters will be expressed in the F2 generation in the ratio 3:1.The one which is expressed in the F1 generation is called the dominant trait and the one which is suppressed is called a recessive trait. In simple words, the law of dominance states that recessive traits are always dominated or masked by the dominant trait. This law can be described by Mendel’s experiment.

Monohybrid cross

A monohybrid cross is a cross between the two monohybrid traits (TT and tt). Here plants which have the same characters, but differ in only one character were crossed.

A monohybrid cross is a cross between the two monohybrid traits (TT and tt). Here plants which have the same characters, but differ in only one character were crossed.For monohybrid cross, Mendel began with a pair of pea plants with two contrasting traits, i.e., one tall and another dwarf. The cross-pollination of tall and dwarf plants resulted in tall plants and the offspring were called F1 progeny. The trait which is expressed in the phenotype is called the dominant trait while the one that is not is called the recessive trait.

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