Biology Factors studied
The Rh ... condition occurs in most of the world population.
Positive
In the ABO series, the gene for blood type O is ... , while A and B are ...t genes, and AB is ...
Recessive, dominant, codominant
A female can be susceptible to expressing hemophilia.
True
(Select all that apply.) Choose from the following list of diseases those that are sex-linked.
color blindness, Muscular Dystrophy, rolling eyeballs, diabetes, non functional sweat glands, certain deafness, white forelock and night blindness.
The Talmud permitted a father with hemophilia to have his son circumcised. Would this preclude all possible problems?
yes-if the mother is not a possible carrier
Rh factor
An inherited protein found on the surface of the red blood cell membrane
Codominence
Both members of an allelic pair contribute equally to the phenotype
Hemophilia is a condition where the blood clotting action is dangerously high.
False
In considering sex-linked inheritance, both sexes are equally susceptible to the manifestation of the trait.
False
In sex-linked inheritance, females are most susceptible because they have only one X chromosome. Therefore, whichever gene is present, be it dominant or recessive, it is expressed. The male has two X chromosomes, and in order to be expressed, both genes must be recessive.
False
The factors that are responsible for the ABO blood type, or the Rh, are located on the surface of the...
erythrocyte
The blood type AB is an example of... Dominance.
incomplete
holandric gene
A gene located on the Y chromosome in XY species
hemophilia
A hereditary condition for bleeding due to the inability to clot properly
Complete the following diagram by placing the graphics on their appropriate spots.
Female with trait in circle spot, male with trait in square spot.
The condition of the Rh factor is called ... when present and ... when absent.
Positive when present, negative when absent
The traits for blood type and Rh are the result of the presence or absence of particular... on the erythrocytes.
Proteins
Sex-linked inheritance refers to ... hereditary alleles usually being passed on the ... chromosome.
Recessive, X
The blood type trait is controlled by more than two alleles for a given gene and therefore is called multiple alleles.
True
Choose from the following list the three genotypes the parents must have in order for a daughter to have X b X b ?
XBXb, XbXb, XbY
Mark the genotypes which express hemophilia.
X^bY and X^b X^b
What would be a female bleeder's genotype? (Let X B stand for the normal condition for clotting and X b stand for the recessive hemophilia allele.)
XbXb
Why didn't Charles and Alexander, the grandsons of Queen Victoria, inherit hemophilia?
because the disease is not on the "Y" chromosome and Helena does not have the trait
Why would it be wise for a woman carrying the hemophilia gene to keep her son from being circumcised?
because the probability of hemophilia would be 1:2
Why didn't the two sons of Queen Victoria (Alfred and Arthur) display hemophilia? (refer to pedigree chart)
because they did not receive the recessive gene (X b ) from their mother.
