Question

Solve the following problems by showing genetic crosses:.in garden pea, tall stem(t) is dominant over dwarf stem(t); roundseed(r) is dominant over wrinkled seed(r):yellow cotyledons(y) is dominant over green cotyledons(y);inflated pods(s) dominant over constricted pods(s);green pods(g) dominant over yellow pods(g) and axial flowers(a) isominant over terminal flower(a). find out the phenotypic ratio ofeach cross:a) tt rr x tt rr b ) ttrr xtt rr c) tt rrx ttrrd) tt rr x tt rr e) yy ss x yy ss f) yyss x yyssg) yyss x yyssh)yyss x yyssi)ggrr x ggrrj) ggrr xggrr k)aatt xaa ttl)ggyy x ggyy​

Answer 1

Answer:

• Since, round seed shape (RR) was dominant over wrinkled seed shape (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy), round seed with yellow cotyledon will be expressed in heterogenous dihybrid genotype. Hence, the cross between round seed, yellow cotyledon plant (RRYY) and wrinkled seed, green cotyledon plant (rryy) will produce all round seeds with yellow cotyledon. Thus, option "E" is correct.

Parent generation:

• RRYY x rryy

• Gametes : RY ry

• Offspring : RrYy

Answer 2

Answer:

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