Podcast Beta
Questions and Answers
What are multiple alleles?
Give an example of multiple alleles.
Blood Types in humans
Each individual can have more than two alleles for each trait.
False
Which of these statements is true regarding ABO blood groups?
Signup and view all the answers
Type O is the __________ donor.
Signup and view all the answers
Type AB is the universal __________.
Signup and view all the answers
What is codominance?
Signup and view all the answers
Provide an example of codominance.
Signup and view all the answers
Study Notes
Multiple Alleles Overview
- Multiple alleles refer to a situation where three or more alleles influence a single trait.
- Individuals inherit two alleles for each trait, one from each parent.
Blood Types as an Example
- Human blood types serve as a prime example of multiple alleles.
- Three alleles govern the ABO blood group system: IA, IB, and i.
ABO Blood Groups
- Four possible phenotypes arise from the ABO blood groups: A, B, AB, and O.
- Six genotypes correlate with these blood types:
- Type A: IAIA or IAi
- Type B: IBIB or IBi
- Type AB: IAIB
- Type O: ii
- Type A has two possible genotypes, type B has two, type AB has one, and type O has one.
Universal Donor and Acceptor
- Type O blood is recognized as the universal donor due to the lack of antigens.
- Type AB blood is known as the universal acceptor because it has both A and B antigens present.
Codominance Explained
- Codominance occurs when both alleles in a heterozygous individual are fully expressed.
- Blood type AB exemplifies codominance, where both A and B antigens are expressed equally in the phenotype.
- In this genetic relationship, A is dominant over O, and B is also dominant over O.
Rh Factor
- The Rh factor determines the presence or absence of the Rhesus protein on red blood cells, affecting blood compatibility.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on multiple alleles with this quiz. Explore the concepts of blood types and the genetics behind traits controlled by three or more alleles. Perfect for biology students wanting to deepen their understanding of genetic variations.
