What is the biological basis of being male or female?

What is the biological basis of being male or female?

(c) sex is the biological basis of being male or female. Explanation: A person with XX chromosomes usually has female sex and reproductive organs and is therefore usually assigned biologically female.

What hormone determines gender?

The testes begin to secrete three hormones that influence the male internal and external genitalia: they secrete anti-müllerian hormone (AMH), testosterone, and dihydrotestosterone (DHT). Anti-müllerian hormone causes the paramesonephric ducts to regress.

How do male and female fetuses differ?

Biological differences between the sexes are apparent even from the early part of the pregnancy. The crown-rump length is larger in male fetuses compared to females in the first trimester. Placentae of male and female fetuses have different protein and gene expressions, especially in adverse conditions.

What does testosterone do in males?

Testosterone is a sex hormone that plays important roles in the body. In men, it’s thought to regulate sex drive (libido), bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm.

What does Y chromosome not detected mean?

2: No Y chromosome DNA detected: the pregnancy is likely to be female. Fetal sex will be confirmed at your 20 week anomaly scan. 3: Test Failure: e.g. insufficient DNA. In a few cases the lab may not be able to demonstrate the presence of fetal DNA.

Who is responsible for baby gender?

Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. An X chromosome combines with the mother’s X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mother’s to make a boy (XY).

Can I take testosterone as a man?

Although some men believe they feel younger and more vigorous if they take testosterone medications, there’s little evidence to support the use of testosterone in otherwise healthy men.

Can I put androgel on my balls?

It (and presumably your product as well) should not be inserted into any body cavity, including your butt! Nor should it be applied to your scrotum.

Is it true that older men lose muscle mass?

“Older men can indeed increase muscle mass lost as a consequence of aging,” says Dr. Thomas W. Storer, director of the exercise physiology and physical function lab at Harvard-affiliated Brigham and Women’s Hospital.

Why do women have more muscle mass than men?

Male testosterone levels allow them to grow a larger total amount of muscle mass naturally. However, this does not mean an easier time gaining muscle and strength in the gym. Several factors, like hormones and genes, control muscle mass and strength. In several instances, these favor females.

When does peak bone mass occur in men and women?

Sex. Peak bone mass tends to be higher in men than in women. Before puberty, boys and girls acquire bone mass at similar rates. After puberty, however, men tend to acquire greater bone mass than women. Race. For reasons still not known, African American females tend to achieve higher peak bone mass than white females.

Is the loss of muscle mass a natural part of aging?

Declining muscle mass is part of aging, but that does not mean you are helpless to stop it. The saying goes there are two certainties in life: death and taxes. But men should also add loss of muscle mass to the list. Age-related muscle loss, called sarcopenia, is a natural part of aging.