Bio Unit 7.2 Discussion

Bio Unit 7.2 Discussion - (2 There are a variety of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
(2). There are a variety of abnormalities in the numbers of sex chromosomes due to nondisjunction during gametogenesis. Please discuss the signs and problems conditions such as Klinefelter and Turner syndromes. The primary source of this discussion response will come primarily from Chapter 10 of Life: The Science of Biology . Before I begin, let’s first discuss how sex is determined by the sex chromosomes. In males and females, each have an X chromosome. Women have an additional X chromosome, while men have a Y chromosome. Accordingly, women have an XX genotype for their sex chromosomes and males have an XY genotype for their sex chromosomes. In gamete production, males produce two kinds of gametes, half which contain X chromosomes and the other half containing Y chromosomes. Now, according to the textbook, nondisjunction can cause abnormal sex chromosome constitutions during meiosis. More specifically, the textbook defines nondisjunction as the occurrence of when a pair of sister chomosomes fails to separate (in Meiosis I) or sister chromatids faile to separate (in Meiosis II). The consequence of this is that gametes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/10/2011 for the course AAS 410.303.81 taught by Professor Pan during the Spring '11 term at Johns Hopkins.

Page1 / 2

Bio Unit 7.2 Discussion - (2 There are a variety of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online