Table of Contents
Can a male have YY chromosomes?
XYY syndrome is a genetic condition that occurs when a male has an extra copy of the Y chromosome in each of their cells (XYY). Sometimes, this mutation is only present in some cells. Males with XYY syndrome have 47 chromosomes because of the extra Y chromosome.
Why is a YY chromosome combination not possible?
What Causes YY Chromosomes to Occur? Known as nondisjunction, this is an error in the sperm cell’s division. The resulting child will have an extra Y chromosome in every cell of his body. However, it’s not a hereditary trait — fathers with XYY chromosomes don’t pass on this syndrome to their sons.
Is a YY genotype possible?
The types of gametes produced by each individual depends on its genotype. So, a YY genotype can only produce gametes with Y alleles. An individual with a Yy genotype produces half Y gametes and half y gametes. A yy genotype produces only y gametes….Mendelian genetics review.
| female\male (down\across) | y |
|---|---|
| Y | Yy |
Does anyone have 2 Y chromosomes?
XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome. However, individuals with this syndrome have one X and two Y chromosomes.
What would happen if YY chromosome?
The extra X and/or Y chromosome can affect physical, developmental, behavioral, and cognitive functioning. Common physical features may include tall stature, lack of secondary pubertal development, small testes (hypogonadism), delayed pubertal development, and breast development (gynecomastia) in late puberty.
What would happen if someone has YY chromosomes?
XYY syndrome is a genetic condition in which a male has an extra Y chromosome. There are usually few symptoms. These may include being taller than average, acne, and an increased risk of learning problems….
| XYY syndrome | |
|---|---|
| Complications | Autism spectrum disorder, ADHD |
| Causes | Genetics |
| Diagnostic method | Chromosomal analysis |
Why do males and females have an XY genotype?
As I’m sure you know, under normal circumstances, females have an XX genotype and males have an XY genotype, where they inherit an X from their mother, and the Y from their fathers. XYY genotypes (scroll down to the bottom) result from a phenomenon known as aneuploidy, or the loss or addition of an extra chromosome.
Can a male have XY and Y chromosomes?
Females carry two X chromosomes (XX), and males carry an X and Y chromosome (XY). The Superman syndrome occurs when males receive an extra Y chromosome at conception, creating an XYY combination. This results in a male baby born with the XYY syndrome, which is a random occurrence due to the sperm cell’s formation before conception occurs.
What causes a person to have 47, XYY syndrome?
47, XYY syndrome is caused by having an extra copy of the Y chromosome in each cell of the body. The Y chromosome is one of the sex chromosomes, and the other sex chromosome is called the X chromosome. Most people have two sex chromosomes, with girls having two X chromosomes, and boys having one X and one Y chromosome.
Can a Y chromosome be viable without the X chromosome?
No, without the genes present on the X chromosome, the embryo would not be viable. The Y chromosome has only around 26 or 30 genes on it.