[3 Mark Questions]

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List two differences in tabular form between dominant trait and recessive traits. What percentage/ proportion of the plants in the F_2 generation/ progeny were round, in Mendel’s cross between round and wrinkled pea plants?

Vidyadip · Accepted Answer

Dominance Recessive Dominance allele it is able to express itself even inthe presence of its recessive allele Recessive allele of factor is unable to express its effect in the presence of dominant allele. It does not require another similar allele to produce its effect on the phenotype. e.g., Tt is tal It producse allele its phenotypic effect only in the presence of similar allele, e.g., tt is dwarf. Dominant allele or factor can from complete polypeptide or enzyme for expressing its effects e.g., red colour of flower in pea. The recessive allele an incomplete or defective polypeptide or enzyme so that the expression consists of absence of the effect of dominant allele, e.g., white flower colour in pea. 75% of the plants were with round seeds.

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Dominance	Recessive
Dominance allele it is able to express itself even inthe presence of its recessive allele	Recessive allele of factor is unable to express its effect in the presence of dominant allele.
It does not require another similar allele to produce its effect on the phenotype. e.g., Tt is tal	It producse allele its phenotypic effect only in the presence of similar allele, e.g., tt is dwarf.
Dominant allele or factor can from complete polypeptide or enzyme for expressing its effects e.g., red colour of flower in pea.	The recessive allele an incomplete or defective polypeptide or enzyme so that the expression consists of absence of the effect of dominant allele, e.g., white flower colour in pea.

Heredity and Evolution — Science STD 10 — Question

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