Identifying the genetic sex of a child is based on finding intracellular Barr bodies that consist of:
A) Inactive chromatin material
B) Male-specific chromosomes
C) Homologous chromosomes
D) Excess autosomal material
Ans: A
Feedback:
Barr bodies are present only when there is more than one X in each cell, signifying a female. The extra X is inactivated and stored as chromatin material that can be visualized in epithelial cells. Genetically normal males have one X and one Y chromosome, so a Barr body is not present. Male-specific encoding is on the Y chromosome only. The maternal and paternal chromosomes of a pair are called homologous chromosomes (homologs).
You might also like to view...
The bone's primary minerals are embedded in _____, bone's main protein
Fill in the blank with the right word.
Identify three locations where secretory IgA can bind to antigens in mucosal tissue, and for each give the fate of the antigen upon binding to secretory IgA
What will be an ideal response?
To minimize hunger pangs while dieting, you should include sufficient ____ with each meal
a. dairy b. pasta c. fat d. protein e. simple sugars
The condition characterized by a deficiency of all pituitary hormones is
A. hyperparathyroidism B. pancreatogenic C. panhypopituitarism