Definitions / Explanation : Phenotype
 

Assertion : Cross of $F_1$ individual with recessive homozygous parent is test cross.

Reason : No recessive individual are obtained in the monohybrid test cross.

For the expression of traits genes provide only the potentiality and the environment provides the opportunity. Comment on the veracity of the statement.

The genotype of a plant showing the dominant phenotype can be determined by

If enough crosses are made between male flies of the genotype $'Aa'$ and the female flies of the genotype $'aa'$ to produce about $1000$ offsprings. Which one of the following is the most likely distribution of genotypes in the offsprings

Test cross involves