Genetics

4. The observable physical characteristics of an organism, determined by its genotype.
5. The genetic makeup of an organism, represented by the alleles it possesses.
7. Having only one copy of a gene or chromosome segment instead of the usual two
9. Having two identical alleles for a particular gene
10. Different forms of a gene that can exist at a specific locus on a chromosome.
11. The failure of chromosomes to separate properly during cell division (meiosis or mitosis)

1. Having two different alleles for a particular gene
2. One gene influences multiple phenotypic traits
3. An allele that expresses its phenotype only in the absence of a dominant allele.
6. Interaction between two or more genes where the expression of one gene is affected by one or more other genes
8. An allele that expresses its phenotype even in the presence of a recessive allele.