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BTD Forums  /  The Encyclopedia/ D'Adamo Library  /  Mg Antigen and Secretor Status
Posted by: Patty H, Tuesday, March 22, 2011, 6:58pm
Our daughter was home on spring break from college and I decided to have her tested for the Mg Antigen and secretor status.

Come to find out, she does have the rare Mg antigen, but she is MMg whereas I am NMg.  Would this mean my husband has to be MM?  Could he still be MN?

Also, she is a secretor (Lewis a-b+) while I am a non-secretor.  Does this mean that my husband has to be a secretor?  

I have yet to understand the heredity of blood types  -  sorry - didn't do very well in high school biology or chemistry either  :-/  One thing I do know is that we are a family of four happy O+.
Posted by: Lola, Tuesday, March 22, 2011, 7:03pm; Reply: 1
homozygous of M
why not test your husband and eliminate your doubting?

I am homozygous of N
Posted by: Patty H, Tuesday, March 22, 2011, 7:12pm; Reply: 2
Wouldn't my daughter be a heterozygote rather than a homozygote?  She is M-Positive, Mg-Positive and N-Negative, since Mg is a an antigen in the MNS system?
Posted by: C_Sharp, Tuesday, March 22, 2011, 7:20pm; Reply: 3
Daughter is  heterozygous having alleles M and Mg

Since her Mg allele came from her mother, she got the M allele from father.

Father could be homozygous MM or heterozygous MN
Posted by: C_Sharp, Tuesday, March 22, 2011, 7:25pm; Reply: 4
Secretor is dominant.

You would be homozygous sese.

Daughter would be heterozygous Sese.

Father would be a secretor-could be homozygous SeSe or heterozygous Sese.

Here are diagrams of how it works for secretor parents:

http://www.dadamo.com/cgi-bin/Blah/Blah.pl?b-lr4yt/m-1244429314/#num3
Posted by: Patty H, Tuesday, March 22, 2011, 7:28pm; Reply: 5
Quoted from C_Sharp
Daughter is  heterozygous having alleles M and Mg

Since her Mg allele came from her mother, she got the M allele from father.

Father could be homozygous MM or heterozygous MN


C_sharp, how about the secretor status?  Does this mean my husband has to be a secretor since I am a non secretor?
Posted by: Patty H, Tuesday, March 22, 2011, 7:29pm; Reply: 6
Quoted from Patty H


C_sharp, how about the secretor status?  Does this mean my husband has to be a secretor since I am a non secretor?


oops - sorry, C_sharp.  Didn't see the second posting.

Thank you!
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