Question

Show the cross of (RRyy × rrYY) and also give the phenotypic and genotypic ratio. ​

Answer 1

The PHENOTYPIC RATIO will be

= 9:3:3:1

The GENOTYPIC RATIO will be

= 1:2:2:4:2:2:1:1:1

☸️ PHENOTYPE :-

It is observable characteristic of an individual such as tallness or dwarfness.

The observation of the second filial generation of the di hybrid cross is as follows :-

(i) Round, Yellow = 9/16

(ii) Round, green = 3/16

(iii) Wrinkled, Yellow = 3/16

(iv) Wrinkled, green = 1/16

Thus,

Phenotypic ratio is :-

9:3:3:1

☸️ GENOTYPE :-

It is a gene compliment of an individual with regards to one or more characteristics.

Such as TT, Tt or tt.

The observation of the second filial generation of the di hybrid cross is as follows :-

(i) RRYY = 1/16

(ii) RRYy = 2/16

(iii) RrYY = 2/16

(iv) RrYy = 4/16

(v) RR yy = 1/16

(vi) Rryy = 2/16

(vii) rrYY = 1/16

(viii) rrYy = 2/16

(ix) rryy = 1/16

Thus,

The GENOTYPIC RATIO is :-

1:2:2:4:2:2:1:1:1

Refer to the attachment for the Dihybrid cross of the two given traits.

F1 generation :- It is a generation of hybrid produced from a cross between genetically different individuals called as parents.

F2 generation :- second filial generation is a generation of the individuals which develops as a result of interbreeding of individuals of F1 generation.

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