SR Gene Region
The sex-determining region (SR) of the Y chromosome contains the SRY gene. The analogous sex-determining region (SR) of the X chromosome lacks the SRY gene. An individual without any SRY gene will develop into a female. Having an SRY gene will trigger male development.
Alleles
People normally have two alleles per gene, one inherited from their mother and one inherited from their father.
X (Global)
This allele has been widespread globally for tens of thousands of years.
Y (Global)
This allele has been widespread globally for tens of thousands of years.
Allele Pairs
It is the combination of a person's pair of gene alleles that influences traits.
| Predictable | Female Anatomy | |
| Predictable | Shorter Height | |
| Predictable | Longer Life Span | |
| Allele Pair | People with this allele pair have female anatomy. While females tend to be shorter and live longer than males, many factors influence height and longevity, including other genes, health, and diet. | |
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| Predictable | Male Anatomy | |
| Predictable | Taller Height | |
| Predictable | Shorter Life Span | |
| Allele Pair | People with this allele pair have male anatomy. While males tend to be taller and have a shorter life span than females, many factors influence height and longevity, including other genes, health, and diet. | |
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