Which of the following is true about continuous phenotypic variation and discret

Question

Which of the following is true about continuous phenotypic variation and discrete variation?

  

1-Discrete phenotypic variation is characterized by easily distinguished phenotypic categories. 2- Discrete phenotypic variation is characterized by a range of phenotypes that must be quantitatively measured. 3-Continuous phenotypic variation is characterized by easily distinguished phenotypic categories. 4-Continuous phenotypic variation is characterized by a range of phenotypes that must be quantitatively measured. 5- Discrete phenotypic variation can only be caused by alleles that are completely dominant. 6- Continuous phenotypic variation can be caused by many genes affecting a trait and/or environmental variation. 7-Discrete phenotypic variation is commonly caused by environmental variation.

Explanation / Answer

For continuous phenotypic variations options

3,4 and 6 are true as these variations are continuous,quantifiable and has environmental effect with phenotypical variations.

For discrete variation option

5 is only correct as these variations arises at gene level and the environment has little.

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