Assume that flower colour is controlled by a single gene. In a given plant, red flower colour is dominant over white flower colour. Two red flower bearing plants were crossed and the progeny consists of 45 plants bearing red flowers and 4 plants bearing white flowers this indicates that

Q. Choose the correct answer from the alternatives given.

Q. In peas, tallness is dominant over dwarfness, and the red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny in numbers mentioned against them:

Tall, Red = 138
Tall, White =132
Dwarf, Red = 136
Dwarf, White = 128

Mention the genotypes of the two parents and of the four offspring types.

Q. What is the ratio of progeny, when a red-flowered heterozygous plant is crossed with a white-flowered plant, in which red flower is dominant to white flower?

Q. A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be

Q. If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be