Vocabulary, define the following terms
1. Allele: An allele is a variant form of a given gene, sometimes, the presence of different alleles of
the same gene can result in different observable phenotypic traits, such as different
2. Locus: Is a set of all points, whose location satisfies or is determined by one or more specified
3. Dominant: Is a relationship between alleles of one gene, in which the effect on phenotype of
one allele masks the contribution of a second allele at the same locus.
4. Recessive: is a gene that can be masked by a dominant gene.
5. Heterozygote (Hybrid): It is either a combination of the same two dominant alleles or the same
two recessive alleles.
6. Homozygote: This refers to having identical pairs of genes for any given pair of hereditary
7. Genetic linkage: This refers to the tendency of DNA sequences that are close together on a
chromosome to be inherited together during the meiosis phase of sexual reproduction.
8. Codominance: Is a form of dominance wherein the alleles of a gene pair in a heterozygote are
9. Pleiotropy: This is a situation that occurs when one gene will code and control the phenotype or
expression of several different and unrelated traits.
10. Polygenic: Refers to traits that are controlled by two or more than two genes (usually by many
different genes) at different loci on different chromosomes.
11. Nondisjunction: Refers to the failure of homologous chromosomes or sister chromatids to
separate subsequent to metaphase in meiosis or mitosis so that one daughter cell has both and
the other neither of the chromosomes.
12. Incomplete phenotype: is dominance which refers to a genetic situation in which one allele does
not completely dominate another allele, and therefore results in a new phenotype.
13. Inheritance: It is the concept that when a class of objects is defined, any subclass that is defined
can inherit the definitions of one or more general classes.
Complete the Following Chart
Lack of facial hair
Reduced muscle mass