(A) Let the red flower allele be $R$ and the white flower allele be $r$. The hybrid between red $(RR)$ and white $(rr)$ strains is $Rr$ (red-flowered)

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(A) Let the red flower allele be $R$ and the white flower allele be $r$. The hybrid between red $(RR)$ and white $(rr)$ strains is $Rr$ (red-flowered).When this hybrid $(Rr)$ is crossed back with the pure red-flowered strain $(RR)$:$Rr \times RR \rightarrow RR, RR, Rr, Rr$.All offspring possess at least one dominant $R$ allele,resulting in $100\%$ red-flowered progeny.Therefore,the correct option is $A$.

Class 12 Biology Principles of Inheritance and Variation Inheritance of one gene

Medium

In pea plants,hybrids between red-flowered and white-flowered strains were crossed back to a pure red-flowered strain. The progeny of this cross will have:

A
Red flowers only
B
White flowers only
C
Equal number of red and white flowers
D
Mostly red flowers

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Class 12 Questions

Class 12

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Chapter

Principles of Inheritance and Variation

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Inheritance of one gene

If the genotype of an offspring is $TT$,determine the number of possible gamete types produced by it.

Medium

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If two pea plants with red flowers,whose genotypes are unknown,are crossed,$75\%$ of the offspring have red flowers and $25\%$ have white flowers. The genotypes of the red-flowered parent plants must be:

Medium

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Mendel proposed the Law of Purity of Gametes based on:

Easy

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$A$ cross between two homozygous parents that differ in only one gene locus is known as a....

Medium

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When a heterozygous tall plant is crossed with a homozygous dwarf plant,what will be the proportion of dwarf progeny in the next generation (in $\%$)?

Medium

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In pea plants,hybrids between red-flowered and white-flowered strains were crossed back to a pure red-flowered strain. The progeny of this cross will have:

Similar Questions

If the genotype of an offspring is $TT$,determine the number of possible gamete types produced by it.

If two pea plants with red flowers,whose genotypes are unknown,are crossed,$75\%$ of the offspring have red flowers and $25\%$ have white flowers. The genotypes of the red-flowered parent plants must be:

Mendel proposed the Law of Purity of Gametes based on:

$A$ cross between two homozygous parents that differ in only one gene locus is known as a....

When a heterozygous tall plant is crossed with a homozygous dwarf plant,what will be the proportion of dwarf progeny in the next generation (in $\%$)?

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