Asked by Lauren Enloe on Jun 04, 2024
Verified
Considering that males can have Klinefelter (XXY) syndrome, XYY, and normal XY chromosomal combinations, and females can have Turner (XO) syndrome, poly-X (XXX, XXXX) , and normal XX combinations, it is obvious that
A) male characteristics result from the presence of only one X chromosome.
B) male characteristics result from the absence of two or more X chromosomes.
C) male characteristics result from the minimal presence of one Y chromosome.
D) female characteristics result from the presence of two or more X chromosomes.
E) sex determination is a delicate balance between X and Y chromosomes.
Klinefelter Syndrome
A genetic condition in males resulting from an extra X chromosome, characterized by reduced fertility and often mild physical and cognitive features.
Chromosomal Combinations
Variations in the arrangement and number of chromosomes, contributing to genetic diversity in sexual reproduction.
Turner Syndrome
A chromosomal condition that affects development in females, where a female is partly or completely missing an X chromosome, leading to various medical and developmental issues.
- Elucidate the role of sex chromosomes in establishing an individual's sex.
Verified Answer
CS
courtney sallisJun 06, 2024
Final Answer :
C
Explanation :
Male characteristics result from the presence of the minimal amount of one Y chromosome. The Y chromosome contains the key gene SRY, which triggers the development of male gonads (testes) in the early stages of embryonic development. The X chromosome does not determine maleness, but rather contributes to other traits such as height, hair color, and immune function. Therefore, males can have a variety of chromosomal combinations as long as they have at least one Y chromosome to trigger male development.
Learning Objectives
- Elucidate the role of sex chromosomes in establishing an individual's sex.