Question

Why are some pea plants tall while others are short? Explain with reference to the role of genes in controlling characteristics.

Class 10 Biology
Points:25(if I mark you as brainliest)

Thanks in advance :)

Answer 1

some pea plants are tall while some are short
pea plants having TT Tt are tall while plants showing tt is short . this is because T is a dominant trait while t is a recessive trait.

Answer 2

In the F1 generation
All the plants are hybrid and have Tt genes .They all are tall because tallness is a dominant gene while the dwarfness is a recessive gene.
This is called as Mendel's law of Dominance
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In the F2 generation
When the gametes are formed they separately segregates themselves so that each gamete may get only one of the two alternative factors either T or t and hence F2 plants are both tall and dwarf
Moreover this is called as Mendel's law of segregation