Question

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
A) Four
B) Three
C) Nine
D) Two

Answer 1

The genetic combination of traits in an organism is considered a genotype. The genotype contains a whole set of all heritable genes, which are passed from one generation to subsequent generations. During the formation of gametes, the Mendelian law of inheritance is followed and Punnett square is used to find the different kinds of gametes from a genotype, which is a pictorial display of Mendelian inheritance.

Complete answer:

Fig: Display of Gametes from Genotype of an Organism - Sample
The formation of the number of gametes is decided by the count of heterozygous alleles present in the given genotype.
$2^n$ is the formula used to find the number of gametes where $n$ is the count of heterozygous alleles in the genotype.
Option 4. D) two:
In the given genotype, Bb is the heterozygous allele, so
$n = 1$. After substituting this in the formula,
The number of gametes = $261 = 2$. So $2$ types of gametes are formed.
In this case, AABbCC produces gametes, namely AbC and ABC.
Option 4 is correct

Additional Information
Option 1. A) four: As two gametes, getting four is impossible.
Option 1 is not correct

Option 2. B) three: Getting three is not a probable answer according to the formula.
Hence, Option 2 is not correct

Option 3. C) nine: Nine is an improbable answer after substitution in the formula.
So, Option 3 is not correct

Hence, Option 1 is the correct answer.

Note:
The heritable genes encode the traits, which are physically revealed in an organism. Along with the genotype, environmental factors also have been involved in the determination of the phenotype. In particular environmental conditions only, some genes exhibit a given phenotype. So, the phenotype and genotype of an organism need not be always correlated.