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  4. The Punnett square given below shows the pattern of inheritance in a dihybrid cross, where Round (R) is dominant over Wrinkled (r) seeds and Yellow (Y) is dominant over Green (y) seeds. Identify the odd one: <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/b-46qycu1rixwrfztc.jpg />

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Q. The Punnett square given below shows the pattern of inheritance in a dihybrid cross, where Round (R) is dominant over Wrinkled (r) seeds and Yellow (Y) is dominant over Green (y) seeds. Identify the odd one:
Question

NTA AbhyasNTA Abhyas 2020

Solution:

Punnett square is a graphical representation of determining genotype and phenotype in an individual inherited from the parents.
Here is a Punett square for $F_{2}$ generation showing dihybrid cross in dominant Round and Yellow $\left(\right.RRYY\left.\right)$ pea plant with recessive Wrinkled and Green $\left(\right.rryy\left.\right)$ pea plant. The ratio of the $F_{2}$ progeny is $9:3:3:1$ in dihybrid cross producing total $16$ plants.
Parental Genotype in $F_{1}$ generation- $RrYy\times RrYy$
Here, column $F$ i.e. $RRyy$ is odd because it has both one dominant and one recessive character in homozygous form.
Solution