Male Patterned Baldness

By: Kyra Braun

Male Patterned Baldness Pedigree

Pedigrees can be used to counsle couples who are thinking about having children. Genetic counselors must get a graduate degree for genetic counseling. Those who seek counseling often know of a genetic disorder that runs in the family, and are worried their child could get it.

MALE PATTERNED BALDNESS IS...

Male patterned baldness is autosome dominant.

With Hair or Without Hair?

Phenotypes and Genotypes

Generation 1:

"Bob" Male heterozygous (Aa) -> With hair (But carries baldness trait)
"Sue" Female heterozygous (Aa) -> With hair (But carries baldness trait)

Generation 2:

"Mary" Female heterozygous (Aa) -> With hair (But carries baldness trait)

-> Marries "Mike" Male heterozygous (Aa) -> With hair (But carries baldness trait)

"Jack" Affected Male (aa) -> Bald

-> Marries "Jill" Female (A-)

Generation 3:

---------> Mary's Children

-->"May" and "June" Twins (A-)

--> "Ted" Affected Male (aa) -> Bald

---------> Jack's Children

-->"Phil" Male heterozygous (Aa) -> With hair (But carries baldness trait)

Questions?

How can a family pedigree be useful when discussing your medical history with a doctor?

  • By using your family pedigree, you can determine which genetic disorders you may have.

Under what conditions of inheritance can a pedigree predict with 100 percent certainty what they genotype of an offspring will be?

  • If the alleles are homozygous dominant for both parents, then the genotype with be the same.

Ahhh... The Summary

Male Patterened Baldness, also known as Genetic Hair Lose, can be inherited by either side of the family. The cause of MPB, or male patterned baldness, is genetics. A man could get the gene for MPB from his mother's side or father's side. Most men know before they get older if they are going to suffer from MPB. For example, if his father and grandfather are bald, then he has a very high risk of also becoming bald. Another example is if his mother's father or brothers are bald. If they are still unsure, symptoms include: excessive hair loss. Men can be tested for this or see a medical consultant. The only true way to deal with MPB though, is to embrace it.