QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
What happens if an XY individual is missing the SRY gene?
A) They will develop female reproductive anatomy
B) They will develop male reproductive anatomy
C) They will have a balanced genetic makeup
D) They will develop both male and female reproductive anatomy
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Answer
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Step 1:I'll solve this problem step by step, focusing on the genetic determination of sex.
Step 2:: Understanding Sex Chromosome Basics
- Humans typically have sex chromosomes XX (female) or XY (male) - The SRY (Sex-determining Region Y) gene is located on the Y chromosome - This gene is crucial for male sexual development
Step 3:: Role of the SRY Gene
- The SRY gene triggers the development of testes in a genetic male - Without the SRY gene, the default developmental pathway is female
Step 4:: Developmental Consequences of Missing SRY
- An XY individual without the SRY gene will NOT develop male reproductive anatomy - Instead, they will follow the default female developmental pathway - This means they will develop female reproductive structures
Step 5:: Analyzing the Possible Answers
- Option A states they will develop female reproductive anatomy - This precisely matches the genetic and developmental consequences of missing the SRY gene
Final Answer
Explanation: The absence of the SRY gene in an XY individual prevents male sexual differentiation, causing the embryo to develop female reproductive anatomy by default.
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