Nondisjunction- the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during nuclear division
Recessive Genes- a gene that can be masked by a dominant gene.
Dominant Genes- a segment of DNA information that is used to make chromosomes.
Somatic Cell- any cell of a living organism other than the reproductive cells.
Germ cell- a cell containing half the number of chromosomes of a somatic cell and able to unite with one from the opposite sex to form a new individual a gamete.
an embryonic cell with the potential of developing into a gamete.
The difference between Mitosis and Meiosis is- Meiosis has two rounds of genetic separation and cellular division while mitosis only has one of each. In meiosis homologous chromosomes separate leading to daughter cells that are not genetically identical
What is a Karyotype? the number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
What is Down Syndrome? is a chromosomal disorder caused by an error in cell division that results in an extra 21st chromosome. The condition leads to impairments in both cognitive ability and physical growth that range from mild to moderate developmental disabilities.
What is a colorblindness? is the inability to distinguish the differences between certain colors. results from an absence of color-sensitive pigment in the cone cells of the retina.
What is Turner's disease? is a medical disorder that affects about 1 in every 2,500 girls. Girls with Turner syndrome are usually short in height. Turner syndrome are born with only one X chromosome or they are missing one x chromosome.