1. A phenotype is an inherited feature that varies from individual to individual. 2. A is one particular variation of a character. 3. A genetic cross involving parents that differ in a single character is called a. 4. Most human genes come in alternate versions called. 5. If an organism has two non-identical versions of a gene, the one that is expressed in the organism is called the allele. 6. If an organism has two non-identical versions of a gene, the one that is not expressed in the organism is called the allele. 7. The physical traits of an organism are called its. 8. The is the genetic makeup of an organism.

1. Character

2. Trait

3. Monohybrid cross

4. Alleles

5. Dominant allele

6. Recessive allele

7. Phenotype

8. Genotype

Explanation:

1. Character is an inherited feature passed through genes that varies in individual e. g flower colour

2. A trait is the variant form of a character e. g red and blue flower colour are variant forms of the flower colour character.

3. Monohybrid cross is a cross between two parents differing in only one character.

4. Allele is an alternate form of a gene e. g A and a alleles for gene A

5. Dominant allele is one of the allelic pair that expresses itself by masking the expression of the other allele in a heterozygous state.

6. A recessive allele is the allele that is masked or not expressed in a gene. It is covered up by the presence of the dominant allele.

7. Phenotype is the physical and visible trait of an organism e. g Tallness, colour

8. Genotype is the genetic constituent of an organism e. g AA, Aa etc.