16. in humans, the gene for red-green color blindness is located near the telomere of the qarm of the x cfuomosome. red-green colorblindness is the inability to distinguishbetween shades of red, brown and green. the gene is expressed as iecessive a'nd normalcolor vision is the dominant allele. a. if a homozygous normal woman marries a color_blind man, whatare the chances that any of their children will be color_blind? b. if a color-blind woman marries a normal vision man, which ofher children will be color-blind? c. why is it a common belief that only men can be color_blind?
17. a color-blind woman has a color-blind brother, and their mother has normal colorvision. with reference to color vision, what is the genotype of both their parents? if thebrother marries a woman with the same genotype as his mother, what kind of color visior. will their daughters and sons have, and in what ratios?
_1_8. in humans, hemophilia is inherited as a recessive allele linked to the x chromosome. hemophilia is a disorder that results in the failure of blood to clot. a man und u *o*unwho are both normal clotters have tkee children named amy, hany and mary. harry isa hemophiliac, who has a normal clotting daughter. mary has normal clotting btooa aadshe has two sons, one of whom is a hemophiliac. amy and her five sons are -all normalclotters.. what are the probable genotypes for the 2 grandparents, 3 children and ggrandchildren?
19. h the fruit fly (drosophira meranogaster), the gene for red eye color (r) is dominantover white (r) and is located on the x chromosome. what is the iistribution (ratio) of eyecolors among the male and female offspring in each of the following ".o. r".? a. white-eyed female crossed red-eyed maleb. heterozygous red-eyed female crossed white-eyed malec. heterozygous red-eyed female crossed red-eyed malemultiple alleles - crosses in which more two aneles are available
20' blood type (a' b' ab and o) in humans is determined by three possible alreles (ia, ib, i) located on chromosome #9. the la, and ib alleles are co-dominant. determine tiregenotypes of the following parents: i jvp" e father & type a mother with children ofall four blood typesi ivp" ab father & type b mother with 25%t1pe a,25%type ab & 50% type bc. both parents of type a blood with. ls% type a and 25% type o chitdren
21. mistakes were made in the matemity ward and two sets of parents claim tobe the real parents ofone child. situation 1 - the child has type ab blood, mother #1 has type b blood, father #l has type b blood, mother #2 has iype bujg9f. an{eatuer #2 has type a brood. who does the child belong to? situation z - thechild has type o blood, mother #l has type b blood, farher #l has type a blood, mother #2 has type b blood and father #2 has type ab blood. who does the chiidbelong to?