How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Ken Your Own Question

Ken
Ken, Postgraduate doctor
Category: Medical
Satisfied Customers: 6331
Experience:  Working as a Doctor who Cares since 2001.
25541092
Type Your Medical Question Here...
Ken is online now
A new question is answered every 9 seconds

My blood type is A positive and my sister is AB negative.

Resolved Question:

My blood type is A positive and my sister is AB negative. Does this mean that we don't have the same biological parents.
Submitted: 3 years ago.
Category: Medical
Expert:  Ken replied 3 years ago.
Hello,

No this does not mean that you do not have same biological parents.

If parents blood group is A and AB than child can have blood group A, B or AB. Even if both the parents are Rh positive than too it is possible. In nutshell it is possible that you do have same biological parents.

Wish you best of health. God bless
Customer: replied 3 years ago.
Hello - Sorry to trouble you again but I thought that both parents had to have at least one negative setting to have a rh negative child. - I am willing to pay an extra amount to have a more detailed answer. Thank you.
Customer: replied 3 years ago.

Hello again Dr. Ken - Sorry I should have mentioned that my fathers blood type was A positive but I do not know what my mothers blood type was.

Expert:  Ken replied 3 years ago.
Hello,

I can understand your anxiety.

Let me explain in a bit detail.

People are divided into four major blood types: A, B, AB and O, depending on which antigens they have. Every individual inherits one antigen from each of their parents and the A and B antigens are called the 'dominant' ones. This means that if a person has one B and one O antigen the B will be dominant over the O and their blood reacts as type B. It is quite possible for children to have a different blood type from their parents, even if both parents have the same blood type. For example, if both parents are type B and have the BO antigens, they could have children who are BB (B antigen inherited from both parents), BO (B from one parent, O from the other) or OO (O antigen from both parents).

Rh status {positive or negative} works in a way similar to Blood type groups. If you are Rh positive, you may have genes for both positive and negative. If you are Rh negative, you have two genes for Rh negative.

PARENTS' BLOOD TYPES POSSIBLE CHILD NOT POSSIBLE CHILD
A and A A, O B, AB
A and B A, B, AB, O no
A and AB A, B, AB O
A and O A, O B, AB
B and B B, O A, AB
B and AB A, B, AB O
B and O B, O A, AB
AB and AB A, B, AB O
AB and O A, B AB, O
O and O O A, B, AB


Similarly:


If your fathers blood group is Rh positive that means his child can be either positive or negative. But if both the parents have negative Rh than their child can not be positive.

I tried to make it as simple as possible!

God bless
Ken, Postgraduate doctor
Category: Medical
Satisfied Customers: 6331
Experience: Working as a Doctor who Cares since 2001.
Ken and 6 other Medical Specialists are ready to help you
Expert:  Ken replied 3 years ago.
Hello,

If your Father is A positive that means he has dominant A gene along with o gene and both positive and negative Rh. So he can pass either A or O as well as positive and negative Rh.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I feel so much better today, and upon further investigation believe that there is a chance that the responses I got saved me from a serious, even life threatening situation. I am very grateful to the experts who answered me. Susan O. USA
< Last | Next >
  • I feel so much better today, and upon further investigation believe that there is a chance that the responses I got saved me from a serious, even life threatening situation. I am very grateful to the experts who answered me. Susan O. USA
  • I can go as far as to say it could have resulted in saving my sons life and our entire family now knows what bipolar is and how to assist and understand my most wonderful son, brother and friend to all who loves him dearly. Thank you very much Corrie Moll Pretoria, South Africa
  • I thank-you so much! It really helped to have this information and confirmation. We will watch her carefully and get her in for the examination and US right away if things do not improve. God bless you as well! Claudia Albuquerque, NM
  • Outstanding response time less than 6 minutes. Answered the question professionally and with a great deal of compassion. Kevin Beaverton, OR
  • Suggested diagnosis was what I hoped and will take this info to my doctor's appointment next week.
    I feel better already! Thank you.
    Elanor Tracy, CA
  • Thank you to the Physician who answered my question today. The answer was far more informative than what I got from the Physicians I saw in person for my problem. Julie Lockesburg, AR
  • You have been more help than you know. I seriously don't know what my sisters situation would be today if you had not gone above and beyond just answering my questions. John and Stefanie Tucson, AZ
 
 
 

Meet The Experts:

 
 
 
  • Dr. Thomas, MD

    Board Certified Physician

    Satisfied Customers:

    46349
    Internal Medicine--practice all of internal medicine, all ages, family, also Integrative, CAM, etc
< Last | Next >
  • http://ww2.justanswer.com/uploads/DR/DrThomasMd/2012-7-25_134438_Imagess1.64x64.jpg Dr. Thomas, MD's Avatar

    Dr. Thomas, MD

    Board Certified Physician

    Satisfied Customers:

    46349
    Internal Medicine--practice all of internal medicine, all ages, family, also Integrative, CAM, etc
  • http://ww2.justanswer.com/uploads/MY/mysticdoc/2012-6-8_15615_mysticdoc3.64x64.jpg Dr. D.J.'s Avatar

    Dr. D.J.

    Board Certified Physician

    Satisfied Customers:

    14679
    MD
  • http://ww2.justanswer.com/uploads/agketch/2008-7-14_184046_drketchresized.jpg Dr. Ketch's Avatar

    Dr. Ketch

    Board Certified Physician

    Satisfied Customers:

    76
    Medical Degree, Former Assistant Professor at School of Medicine at Yale University
  • http://ww2.justanswer.com/uploads/FA/FamilyPhysician/2013-8-31_191624_JA550x500Photo.64x64.jpg Family Physician's Avatar

    Family Physician

    Doctor

    Satisfied Customers:

    2562
    Emergency Medicine and Family Practice for over 26 years
  • http://ww2.justanswer.com/uploads/DR/drappapo/2013-8-16_22576_drdavid.64x64.jpg Dr. David's Avatar

    Dr. David

    Board Certified Physician

    Satisfied Customers:

    224
    Treat children/young adults, former chief resident, multiple publications
  • http://ww2.justanswer.com/uploads/DrDLove/2009-08-12_141522_DrDLove.jpg Dr. D. Love's Avatar

    Dr. D. Love

    Doctor

    Satisfied Customers:

    11961
    Family Physician for 10 years; Hospital Medical Director for 10 years.
  • http://ww2.justanswer.com/uploads/CO/commissure/2011-4-15_192514_REISD20080926JR1090.64x64.jpg Dr. David's Avatar

    Dr. David

    Board Certified Physician

    Satisfied Customers:

    10667
    Experienced Physician trained in New York City. I'm ready to help.