What is the pea plant possible genotypes?

Answer 1

Either TT or Tt, where T stands for dominant gene for tallness and t for recessive gene.

Answer 2

There are many possible genotypes in pea plants, though when referring to Biology, the biologist Mendel studied the following genotypes:

Height:

Tall: TT or Tt

Short: tt

Flower Color:

Purple: PP or Pp

White: pp

Flower Position:

Axial: AA or Aa

Terminal: aa

Pod Color:

Green: GG or Gg

Yellow: gg

Pod Shape:

Inflated: II or Ii

Constricted: ii

Pea Color:

Yellow: YY or Yy

Green: yy

Pea Shape:

Round: RR or Rr

Wrinkled: rr

With all of the above, the possible genotypes are listed with the dominant trait first (Being either Homozygous (both capital letters) or heterozygous (one capital, one lower case letter)) and the recessive trait being second.

A pea plant can carry any combination of those different traits that will effect how the plant looks:

For example:

TTPPAAGGIIYYRR would be homozygous (dominant) for all of the traits, therefore making it a pea plant that had: Tall stem, purple/axial flowers, green/inflated pod and Yellow/round peas inside.

and a:

ttppaaggiiyyrr would be homozygous (recessive) for all the traits, therefore making it a pea plant that had: Short stem, white/terminal flowers, yellow/constricted pod and green/wrinkled peas.

But, of course you can mix and match these and get any number of different kinds of plants.

Answer 3

Because both the Purple gene & the Round gene are both dominant genes, there are two ways they can be expressed:

PP or Pp

RR or Rr

Taking that into consideration, there are four different combinations that will give you purple flowers with round seeds, which are:

PPRR

PPRr

PpRR

PpRr