{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

HumanInheritance160-page6

HumanInheritance160-page6 - In general we call this...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Human Inheritance Patterns - 6 Changes in Chromosome Number and Inheritance It is fairly easy to observe our 46 human chromosomes and their shapes, because we can obtain a karyotype, or chromosome display during the metaphase stage of cell division. This allows us to see distinct chromosomes, and detect patterns that are not typical. Aneuploidy For reasons not understood, occasionally, a homologous chromosome pair will fail to separate during meiosis, resulting in an egg or sperm with one more or one less than the normal complement of chromosomes (trisomy or monosomy).
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: In general, we call this non-disjunction or aneuploidy. Most often, a non-disjunction results in a gamete, or if there is successful fertilization, an embryo that does not survive. In some cases, however, some gametes or embryos do survive, producing individuals with abnormal chromosome numbers. Most non-disjunctions have serious genetic consequences. A non-disjunction can affect either the sex-determining chromosomes or autosomes. We will mention a few human examples....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern