MULTIPLE ALLELES, POLYGENIC & SEX-LINKED TRAITS

Unlock the mysteries of human inheritance! Practice predicting genetic traits like blood types and sex-linked disorders.

1. What is an antigen? a component of red blood cells found inside the nucleus a substance that causes the body's immune system to react especially by producing antibodies white blood cells that fight substances foreign to the body the component of blood that aids in blood clot 2. In the ABO blood system, a person can be of blood type _. A B A, B, AB, O A, B, AB, O, ABO 3. A person with antigen B on his red blood cells will have _ blood type. A B AB O 4. Which blood type can be given to an individual whose bloodtype is unknown? A B AB O 5. A blood type AB person can receive blood type _. A B A, B, AB A, B, AB, O 6. In determining the phenotype for the ABO blood system, A is dominant over B B is dominant over A AB is dominant over A or B O is recessive 7. Which of the following is(are) the genotype for blood type A? IAi IAIA neither A nor B either A or B 8. If one of your parents is blood type A and the other is type B, which of the following blood types would you likely be? A only B only A, B, or AB A, B, AB, or O 9. A man has type B blood (genotype BB) and is married to a woman with type O blood. What blood type will all their children have? A only B only A and O B and O 10. A man with type AB blood is married to a woman with type O blood. They have two natural children and one adopted child. Jane has type A blood, Bobby has type B blood, and Grace has type O blood. Which child was adopted? Jane Bobby Grace cannot be determined 1. Which combination of sex chromosomes results in a male human being? XX YY XY either XX or YY 12. Sex-linked traits are inherited by _. males only females only both males and females babies born before they are due 13. Why are sex-linked traits more common in males than in females? All alleles on the X chromosome are dominant. All alleles on the Y chromosome are recessive. A recessive allele on the X chromosome will always produce the trait in a male. Any allele on the Y chromosome will be codominant with the matching allele on the X chromosome. 14. A carrier is a person who has _. one dominant and one recessive allele for a trait two recessive alleles for a trait two dominant alleles for a trait more than two alleles for a trait 15. A woman who is a carrier of hemophilia marries a normal man. What percentage of their children will have hemophilia? 100 % 75 % 50 % 25 % 16. In question 15, what sex will a child in the family have hemophilia? male female both male and female cannot be detrmined 17. A woman who has hemophilia marries a normal man. How many percent of their children will have hemophilia? 100 % 75 % 50 % 25 % 18. In questions 17, what is(are) the sex of the hemophiliac children? males females both males and females cannot be determined 19. A woman carrier who is heterozygous for the recessive, sex-linked trait red color blindness marries a normal man. What proportion of their children will show the trait? all 1 1 0 20. Eun Sung has muscular dystrophy. Neither of his parents has this disease. Ha Eun, Eun Sung's wife does not have muscular dystrophy but her father has. What fraction of their daughters and sons would you expect to have muscular dystrophy? 75 % daughters, 25 % sons 25 % daughters, 75 % sons 50 % daughters, 50 % sons 100% daughters, 0 % sons