In a cross,$45$ tall and $15$ dwarf plants are produced. The genotype of the parents is .....

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:

$A$ black dog heterozygous for the colour is crossed with a white bitch,which is recessive homozygous. The progeny will show black to white offspring in the ratio of:

In a cross,$75$ tall plants and $25$ dwarf plants are obtained. What would be the genotype of the parents?

What is the phenotypic and genotypic ratio in a monohybrid test cross?

What will be the nature of a hybrid plant produced from two alternative alleles?