3. Extensions to Mendelian Inheritance
Sex Chromosome
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Practice this topic
- Multiple Choice
Which of the follow sex chromosomes can be describes as homogametic?
- Multiple Choice
In the ZZ/ZW sex determination system, the male is…?
- Multiple Choice
In humans, which region on the Y chromosome determines maleness?
- Multiple Choice
During meiosis the XY sex chromosomes segregate independently. Which of the following represents the gametes chromosomes after meiosis?
- Open QuestionHow do we know that X chromosomal inactivation of either the paternal or maternal homolog is a random event during early development in mammalian females?
- Open QuestionHow do we know that Drosophila utilizes a different sex-determination mechanism than mammals, even though it has the same sex-chromosome compositions in males and females?
- Open QuestionIn this chapter, we have focused on sex differentiation, sex chromosomes, and genetic mechanisms involved in sex determination. At the same time, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, you should answer the following fundamental questions?How do we know that in humans the X chromosomes play no role in human sex determination, while the Y chromosome causes maleness and its absence causes femaleness?
- Open Question
In this chapter, we have focused on sex differentiation, sex chromosomes, and genetic mechanisms involved in sex determination. At the same time, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, you should answer the following fundamental questions?
How do we know whether or not a heteromorphic chromosome such as the Y chromosome plays a crucial role in the determination of sex?