In humans, hemophilia is an X-linked recessive condition characterized by the inability of blood to clot normally. A woman who is a carrier for hemophilia marries a man who has hemophilia. What are the genotypes of the woman and man, respectively? a. xH+xH+; xH+y O b. xH+xH xH+y C. XH+xH xHy d. XHXH, XHty e. xHxH xHy

Hemophilia, disease in which the blood lacks a clotting factor, is caused by an X linked recessive gene. Joe doe not have hemophilia and Lucille is heterozygous for the condition.  What is the chance that their MALE child will have hemophilia? (Note: you are calculating the probability for their MALE children only, in other words if they have 1 male child, what is the probability that he will be born with the disease?)     0%     1/4 or 25%     2/4 or 50%     3/4 or 75%     4/4 or 100%

What is the karyotype for women who have an extra X-chromosome? Discuss all the ways you can test for this abnormality.

2) You're the director of Foothill Presbyterian Hospital's maternity ward, and you have four mixed-up babies, with blood types of O, A, B, and AB. The four sets of desperate parents are threatening to sue you if you don't get their babies back. You know the blood types (phenotypes) of the parents are: i) AB and O ii) A and O iii) A and AB iv) O and O You also know that each set of parents has only one child (no sets of twins, that is). Match each baby with its parents.

Blood types in humans are Codominant. a. What are the possible genotypes of someone with type O blood? b. What are the possible genotypes of someone with type B blood? c. What is the phenotype of someone’s whose genotype is AO? d. A man with AB blood is married to a woman with AB blood. What blood types will their children be and in what proportion?

A. For the following genotypes state the ABO blood phenotype. JAJA |B|O_ 101⁰_ |A|B_ B. Using genetic diagrams, show how it is possible for a couple with a type A mother and a type B father can have a child with type O blood. C. Using genetic diagrams show how a type AB person with a type O partner have offspring that share neither of their phenotypes.

In humans, hemophilia is an x- linked recessive condition characterized by the inability of blood to clot normally. A woman who is a carrier for hemophilia marries a man who has hemophilia. What proportion of their male children will have hemophilia.  A. 0%b. 25%C.50%d. 75%e. 100%

Change in chromosome numbers will lead to abnormalities. Which of the following is a correct match between the chromosome number and the syndrome?   A. Trisomy 18 : Patau syndrome   B. Monosomy 18 : Turner syndrome   C. XXXY : Klinefelter syndrome   D. Trisomy 21 : Edward syndrome

Color blindness in humans is an X-linked recessive trait. This means that... O a. Females are more likely to be color blind than males b. The gene associated with color blindness is found on the X chromosome, and an individual must have one (in males) or two (in females) mutant copies of the allele in order to be diagnosed as being color blind