Question

Cross between pure plant with violet flowers and pure plant with white flowers the offspring of F1 progeny on hand how Red Flowers in The F1 progeny has still crossed it was observed in the F2 progeny that out of 100,75 flowers are violet . a) make a cross upto F2 progeny
b) mention the genotype and phenotype of F1 progeny
c) give one reason why in F1 progeny both the parental traits
are not expressed

Answer 1

⛦Hҽɾҽ ɿʂ ү๏υɾ Aɳʂฬҽɾ⚑

▬▬▬▬▬▬▬▬▬▬▬▬☟

❖ The condition explained is a dihybrid cross which involves two characters in a single plant. This is also called as dihybrid inheritance.

--> The cross is done between Peaplant which is Tall with Violet flowers (TTWw) and pea plant which is short with white plants (ttww). F1 generation offspring exhibit all pea plants with tall and violet flowers. When F1offspring were self bred they give rise to 9:3:3:1 ratio of plants.

--> Dihybrid inheritance is the experimentation of two characteristics with their four contrasting traits.

For instance, dihybrid inheritance involves a pea plant producing tall and violet flowers (TT and WW) crossing with a plant producing short and white flowers (aa and ww).

--> F1 progeny produces axial and violet flowers (T and t, W and w ) in which axial and violet are dominant traits.

---> F2 progeny were similar to their parents and produced Tall and violet flowers, while some of them produced short and white flowers. However, some plants of the F2 progeny even showed new combinations, like tall white flowers and short violet flowers.

Dominant traits - Tall, Violet

Recessive traits - Short, White

_________

Thanks...✊

Answer 2

Let us solve for it

Explanation:

Monohybrid cross

It is a cross made by considering 1  character at a time .

For example : Let us make cross between two plants having violet and white flowers .

We know that violet flower is dominant over white  flower .

VV                vv       Parental generation

\(violet )         (white )

V,V                v,v        gametes

      Vv                        F1 generation

Then this Vv and Vv are crossed in order to obtain F2 generation .

Vv                  Vv       Parental generation for f2

V,v                 V,v

lets make Punett square for F2 generation :

      V         v  

V     VV     Vv

v     Vv     vv  

Phenotypic ration :   violet flower : red : white

                                        1           :    2 : 1

Genotypic ratio : 1:2:1

In F1 generation the parent traits are not expressed because we got an hybrid /; that is red colour flower

Genotypic ration :      Violet : Hybrid : Red flowers

v

Parental generation :