Normal fruit flies have red eyes. Flies with mutations that block the function of the X-linked white gene have white eyes. The wild-type allele is completely dominant to mutant alleles. White-eyed females are mated to red-eyed males. One of the hundreds of female progeny is white-eyed. This white-eyed daughter likely arose from nondisjunction of the sex chromosomes during _________ in the __________. (multiple answers)Lesch-Nyhan syndrome is an x-linked, rare, recessive disease caused by a mutation in the gene encoding for hypoxanthine-guanine phosphoribosyltransferase (HPRT1). A woman's maternal grandfather suffered from Lesch-Nyhan syndrome. She is concerned her male child could have Lesch-Nyhan syndrome. Genetically, what is the chance that this child has Lesch-Nyhan syndrome?Two alleles of gene C control hair color in horses: C¹and C². Horses homozygous for allele C¹ are red, heterozygotes are yellow, and C² homozygotes are cream. What type of allele interaction is described?A diploid cell with three pairs of chromosomes has the genotype Aa Bb Cc, where each gene is on a different chromosome. If this cell were to undergo meiotic division, how many genetically different types of gametes could be produced?For a known gene map of:A------B----------CIf the map distance between genes A and B is 20 map units and the map distance between genes B and C is 35 map units, what is the map distance between genes A and C?In fruit flies, an X-linked dominant mutant allele of the Notch gene (N) causes Notched wings in heterozygous females but is lethal in hemizygous or homozygous condition. What ratio of offspring would be observed in a cross of a Notched-wing female with a normal male?At which phase of the cell cycle are sister chromatids generated?You examine cells with a microscope and detect one Barr body in each cell. What are the possible genotypes of the cells? (multiple answers question)A litter of puppies from two black Labradors is being born. The first 3 pups are black, yellow, and brown, respectively. Based on the B and E genes regulation of coat color, what is the likelihood that the next pup will be black?Blood type can be described by the following red blood cell surface antigens (multiple answers question):A,B,OM, N antigens (co-dominant)Xg antigensRh factor (rr = Rh- & R- = Rh+)All are autosomal except Xga which is X-link with (a+) dominant.In a paternity case, a mother of blood type A M Xga+ Rh+ had a female of blood type O M Xga- Rh- ?Which of the individuals shown below could be the child's father?Germ-line cells are produced early in embryogenesis for what purpose?"Secretors" (genotypes SS and Ss) secrete their A and B blood group antigens into their saliva and other body fluids, while "nonsecretors" (ss) do not. A female of blood type A and genotype IAi Ss has a child with a man with blood type 0 and genotype ii Ss. What is the probability the child will have a blood type that tests as the O blood type, if typing was done using saliva ?For an unknown genetic map.If the map distance between genes A and B is 20 map units and the map distance between genes B and C is 35 map units, what is the map distance between genes A and C?In corn, a dominant gene C produces colored aleurone; its recessive allele c produces colorless. Another dominant gene Sh produces full, plump kernels; its recessive allele sh produces shrunken kernels due to collapsing of the endosperm. A third dominant gene Wx produces normal starchy endosperm and its recessive allele wx produces waxy starch. A homozygous plant from a seed with colorless, plump, and waxy endosperm is crossed to a homozygous plant from a seed with colored, shrunken, and starchy endosperm. CONTINUE TO NEXT CARDIn a test-cross with two linked genes, the ratio of progeny deviates from the ________________ ratio.In Drosophila, the genes y, f, and v are all X-linked. Females who are homozygous for recessive alleles of all three genes (y f v / y f v) are crossed to wild-type males (y+ f+ v+ /y+ f+ v+ ). The resulting trihybrid F1 females are test-crossed.The F2 are distributed as follows:y f v - 3210y f v+ - 72y f+ v - 1024y f+ v+ - 678y+ f v - 690y+ f v+ - 1044y+ f+ v - 60y+ f+ v+ - 3222Total10,000Which of the following linkage maps correctly shows the order of the y, f, and v genes?Which of these nitrogenous bases is found in DNA but not in RNA?A nitrogenous base is indicated by the letter _____.Nucleic acids are assembled in the _____ direction.4. After replication is complete, the new DNAs, called _________-, are identical to each other.
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