17. Gray fur is dominant (G)If a homozygous gray mouse iscrossed with a white mouse, theoffspring will be18.16. A boy has brown hair and browneyes. His mom has brown hair andhis dad has brown eyes. Which tellsWHY the boy has those traits?shartlonga. A gene mutation occurredb. The boy got genes from bothshortlonglonglongparentslonglongc. Cells from his mother's eyeswere in the fertilized eggа.100% Ggshortionglonglongb. 50% GG and 50% ggAn offspring (baby) is born with adifferent trait from its parents. Why?a. A result of recombined genesduring sexual reproductionb. Product of asexual reproductionA mutation offered after it wasc. 25% GG, 50% Gg, 25% ggC.born

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16. A boy has brown hair and brown eyes. His mom has brown hair and his dad has brown eyes. Which tells WHY the boy has those traits? a. A gene mutation occurred b. The boy got genes from both parents c. Cells from his mother's eyes were in the fertilized egg

16. A boy has brown hair and brown eyes. His mom has brown hair and his dad has brown eyes. Which tells WHY the boy has those traits? a. A gene mutation occurred b. The boy got genes from both parents c. Cells from his mother's eyes were in the fertilized egg

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 7TYK: In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene...

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2. Null mutations are valuable genetic resources becausethey allow a researcher to determine what happens to anorganism in the complete absence of a particular protein. However, it is often not a trivial matter to determinewhether a mutation represents the null state of the gene.a. Geneticists sometimes use the following test forthe nullness of an allele in a diploid organism: If theabnormal phenotype seen in a homozygote for theallele is identical to that seen in a heterozygote(where one chromosome carries the allele in question and the homologous chromosome is known tobe completely deleted for the gene) then the alleleis null. What is the underlying rationale for thistest? What limitations might there be in interpreting such a result?
Name: 2. Some ladybugs have 10 black spots on their shells and some have 4. When true breeding 10 spot individuals are crossed with true breeding 4 spot individuals, the offspring have 7 spots. a. Propose two distinct explanations for this finding. Explain the nature of spot inheritance in each case. D. rew bacteria erred them figure above would of14N7 then ely 2 moldon omrod abitqaq ratlsmmem sge of delw toiisoibom s s neu not oomod aid to soubnup ogusl onomod odi to slevel ismon oouborg o o consu ud od souboini bluow uoy dairlw yd za00oq sdi mialex b. Propose an experiment that would distinguish between these possibilities. sor proieins
5. The ability to taste PTC paper is controlled by a dominant gene. The ability to taste (T) PTC is 1ueunuop sno8Ázounu ae RIR dominant over the inability to taste (t) PTC. Normal skin (N) is dominant over albino skin (n). Two tasters, normally pigmented, have an albino son and a non-taster daughter. Show the cross between the parents. Genotype of mom Genotype of dad Genotypes Phenotypes What is the chance that the albino son is a taster? What is the chance that the non-taster daughter is an albino? What is the chance that the non-taster daughter is a carrier of the albino trait? What is the chance of getting offspring who are heterozygous for both traits?
1. A woman with type B blood gives birth to a girl who is type O. Which of the following men could of been the father (a) Joe- Type O (b) Frank -Type B (c) Steve- Type AB (d) both Joe and Frank (e) Joe, Frank or Steve In mice, coat color is due to the inheritance of three genes located on three different chromosomes. The A gene which determine if a yellow band is present on the hair (A= yellow band, aa=no yellow band ) and the B gene which determines if the hair is brown (bb ) or Black (B). The A and B genes interact to produce the following coat colors: Agouti: AB Cinnamon: A bk black: brewn aabb The third gene is the C gene, which determines if the mice has any hair pigment at all. If the mouse has at least one C allele then the coat color will be determined by the A and B genes as described above. However, if the mouse is cc in genotype it will be albino, regardless of the mouse's A and B genotype. aaB 2. In mice coat color (a) the C gene is dominant to the A and B genes (b) the cc…
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
Choose the statement that is incorrect. a. A son can inherit a recessive allele on an X chromosome from either parent. b. An individual may inherit three or more of each type of chromosome characteristic or the species, a condition called polyploidy. c. A female child inherits one X chromosome from her mother and one from her father. d. Pedigree analysis can be used to determine a future childs chance of being born with achcondroplasia.
A recognized set of symptoms that characterize a genetic disorder is a(n) _______. a. syndrome b. disease c. abnormality d. inheritance pattern
The ability of humans to taste the bitter chemical phenylthiocarbamide (PTC) is a genetic trait. People with at least one copy of the normal, dominant allele of the PTC gene can taste PTC; those who are homozygous for a mutant, recessive allele cannot taste it. Could two parents able to taste PTC have a nontaster child? Could nontaster parents have a child able to taste PTC? A pair of taster parents, both of whom had one parent able to taste PTC and one nontaster parent, are expecting their first child. What is the chance that the child will be able to taste PTC? Unable to taste PTC? Suppose the first child is a nontaster. What is the chance that their second child will also be unable to taste PTC?
. The production of pigment in the outer layer of seedsof corn requires each of the three independently assorting genes A, C, and R to be represented by at leastone dominant allele, as specified in Problem 64. Thedominant allele Pr of a fourth independently assortinggene is required to convert the biochemical precursorinto a purple pigment, and its recessive allele pr makesthe pigment red. Plants that do not produce pigmenthave yellow seeds. Consider a cross of a strain of genotype A/A ; C/C ; R/R ; pr/pr with a strain of genotypea/a ; c/c ; r/r ; Pr/Pr.a. What are the phenotypes of the parents?b. What will be the phenotype of the F1?c. What phenotypes, and in what proportions, willappear in the progeny of a selfed F1?d. What progeny proportions do you predict from thetestcross of an F1?
4. In humans, cystic fibrosis and albinism are both inherited as independently assorting autosomal recessive traits. Use fto represent the recessive allele for cystic fibrosis and Ffor the allele for the unaffected condition. Use A to represent the dominant allele for normal melanin man is albino and heterozygous for cystic fibrosis. His wife has the unaffected phenotype for both traits, although her father had cystic fibrosis and a for the recessive allele for albinism. and her mother is albino. 4a. What is the genotype of the wife? 4b. What is the probability that a child of this couple is albino and has cystic fibrosis?
6. A person is simultaneously heterozygous for two autosomal genetic traits. One is a recessive condition foralbinism (alleles A and a); this albinism gene is foundnear the centromere on the long arm of an acrocentricautosome. The other trait is the dominantly inheritedHuntington disease (alleles HD and HD+). TheHuntington gene is located near the telomere of oneof the arms of a metacentric autosome. Draw all copies of the two relevant chromosomes in this person asthey would appear during metaphase of (a) mitosis,(b) meiosis I, and (c) meiosis II. In each figure, labelthe location on every chromatid of the alleles forthese two genes, assuming that no recombinationtakes place.
7. In humans, the allele for the condition called "hitchhiker's thumb" (h) is thought to be recessive to having a straight thumb (H). Complete the pedigree below to show the probable genotypes. Squares represent males, and circles represent females. Solid shapes show individuals with hitchhiker's thumb. Tetest on O Telw 21 Obe Spagx elift to asqyloneg nembling O N be nick brs O siello frienimob do ebrisasb molaq belexperlo ar emosią yd erl) vd word bna 8 stella tranimob syd ballostno aj otoo belo otin sylace: delslls evideod abud mwond aislą bns ben beoxboro suppysomorneowiad cauro s mengsi bo allueen a bnsa belbsque ont esnammu? en beteaberto S souborg of elem ben nialq s riw batam sismel word bensbero A t sill to sequioneg eldsdong srit evi pnhqalio nword benexperlo bria bas ng s ellene for red.coalcool (