From a single ear of corn a farmer planted 300 kernels which produced 225 tall and 75 short plants. the genotype of these offsprings are most likely to be_____________________?

Related Mcqs:

1. Suppose that out of 1000 offspring’s in the generation of a dithered cross, 748 are tall and hairy, 6 are tall and smooth, 4 are short and hairy and 242 are short and smooth. what is the explanation for this kind of ratio ?

   A. Linkage and crossing over
   B. Presence of multiple alleles
   C. Presence of lethal genes
   D. Sex-linkage

2. When red tall plant is crossed with dwarf white plant all the plants of F, are found to be tall red. which of the following ratio will be available when a test cross is made_________________?

   A. 3:1
   B. 1:2:3
   C. 1:1:1:1
   D. 1:2:1

3. If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?

   A. 1:1
   B. 1:2
   C. 2:1
   D. 3:1

4. Red (RR) is crossed with white (ww). All the (Rw) offsprings are pink this is an indication that the R gene is_________________?

   A. Recessive
   B. Incomplete dominant
   C. Mutant
   D. Dominant

5. When a wheat variety with red kernels (homozygous for two non allelic and independent dominant genes) is crossed with white kenneled wheat (homozygous for two recessive non allelic independent genes), the phenotypic ratio in the F2 generation would be________________?

   A. 9:3:3:1
   B. 9:7
   C. 9:9:9:3:3:3:1
   D. 1:4:6:4:1

6. If the cell of an organism (heterozygous) for two pairs of genes represented by Aa, Bb, undergoes meiosis then the possible genotype of gametes are________________?

   A. AB, ab
   B. Ab, ab
   C. AB, Ab, aB, ab
   D. Data insufficient

7. Low magnitude of genotype x environmental interaction indicates__________________?

   A. High buffering capacity
   B. Stability
   C. Low buffering capacity
   D. Adaptability

8. The crossing of a yomozygous tall plant and a homozygous dwarf plant would yield plants in the ratio of_________________?

   A. 2 tall: 2 dwarf
   B. All homozygous dwarf
   C. All the heterozygous tall
   D. One homozygous tall, one homozygous dwarf, two heterozygous tall

9. If a plant heterozygous for tallness is selfed, f2 feneration has both tall and dwarf plants. this proves the principle of__________________?

   A. Dominance
   B. Segregation
   C. Independent assortment
   D. Incomplete dominance

10. After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are__________________?

    A. Heterogeneous
    B. Heterozygous
    C. Homogenous
    D. Homozygous