Author: admin

15. Two plants with white flowers are crossed. White flowers arise due to recessive mutation. All F1 progeny have red flowers. When the F1 plants are selfed, both red and […]

14. A plant heterozygous for a dominant trait was selfed. The progeny had 140 plants showing the dominant trait and 20 plants showing the recessive trait. A researcher hypothesised that […]

13. A plant with red fruit is crossed to a plant with white fruit. The F1 progeny had red fruits. On selfing the F1 two kinds of progeny were observed, […]

12. Two interacting genes (independently assorting) were involved in the same pathway. Absence of either genes function leads to absence of the end product of the pathway. A dihybrid cross […]

The following is the biochemical pathway for purple pigment production in flowers of sweet pea: Recessive mutation of either gene A or B leads to the formation of white flowers. […]

10. When two independent pure lines of pea with white flowers are crossed, the F1 progeny has purple flowers. The progeny obtained on selfing shows both pruple and white flower […]

9. Two mutant plants, both bearing white flowers, were crossed. All F1 plants had red coloured flowers. When an F1 plant was selfed it produced progeny with either red or […]

8. A cross is made between two plants with white flowers. All the F1 progeny had red coloured flower. This is because of (1) complementation    (2) recombination (3) translocation          (4) […]

7. There are two mutant plants. One shows taller phenotype than wild type, whereas the other has the same height as the wild type. When these two mutations were brought […]

A cross between hens with different comb shape was carried as shown in figure. The conclusion which can be drawn is (1) Single gene is involved for comb shape (2) […]