The number of Barr bodies in female and male nucleus. Introduction: The first visualization of Barr body was by Murray Barr- 1949 . Barr body is a dense structure of chromatin, forms in the nuclei of female somatic cells. In humans, females have two X chromosomes and males have one X and one Y chromosomes. The sex cells or gamete cells are the only cells that take part in sexual reproduction while the remaining cells are called somatic cells that do not participate in the process. In females, one X chromosome is active while another X is inactivated through the process of lionization, and it becomes a Barr body. In order to have an equal amount of X chromosome expression in both males and females, X inactivation is necessary; otherwise the amount of genetic information expressed will be two fold or more. The selection of X chromosome to be inactivated is random, but once the active and inactive X chromosomes are selected, the descendent cells will have the same X chromosome active and inactive.

Question

Want to see the full answer?

Answer 1

Question

Chapter 3, Problem 10P

Summary Introduction

To analyze:

The number of Barr bodies in female and male nucleus.

Introduction:

The first visualization of Barr body was by Murray Barr-1949. Barr body is a dense structure of chromatin, forms in the nuclei of female somatic cells. In humans, females have two X chromosomes and males have one X and one Y chromosomes. The sex cells or gamete cells are the only cells that take part in sexual reproduction while the remaining cells are called somatic cells that do not participate in the process. In females, one X chromosome is active while another X is inactivated through the process of lionization, and it becomes a Barr body. In order to have an equal amount of X chromosome expression in both males and females, X inactivation is necessary; otherwise the amount of genetic information expressed will be two fold or more. The selection of X chromosome to be inactivated is random, but once the active and inactive X chromosomes are selected, the descendent cells will have the same X chromosome active and inactive.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

calculate the questions showing the solution including variables,unit and equations all the questiosn below using the data.show solving and answer a) B1, b) B2, c) hybrid rate constant (1) d) hybrid rate constant (2) e) t1/2,dist t1/2,absorb f) t1/2,elim k) apparent central compartment volume (V1,app) p) total AUC (using short cut method) apparent volume of distribution based on AUC (VAUC,app) apparent clearance (CLapp) absolute bioavailabilty of oral route ( AUCiv =116ml)

Please help me to draw this by hand. In as much detail as possible, hand draw a schematic diagram of the hypothalamic-pituitary-gonad (HPG) axis in the human female. Be sure to include all the relevant structures and hormones. You must define all abbreviations the first time you use them. Please include (and explain) the feedback loops.

Please refer below