Heredity


 * HEREDITY **







Assignment 1:

1. Define genes A gene is a unit of inheritance.

2. Define alleles Alleles are different forms of a gene. They occupy the same relative positions on a pair of homologous chromosomes.

3. Define chromosomes A chromosome is a rod-like structure visible in the nucleus during cell division.

4. Define homologous chromosomes Chromosomes that exists in pairs, are similar in shape and size, and have exactly the same order or sequence of a gene loci.

5. Define heterozygous chromosome An individual chorosome who has different alleles for a particular trait.

6. Define phenotype The expressed trait in an individual. examples: outward appearances such as height and eye colour. 7. Define genotype It is the genetic make-up of an organism, that is, the combination of genes in an organism.