3. When a guinea pig with polydactyly is mated with a guinea pig that has normal feet, one half of the offspring have polydactyly and one half have normal feet. If two guinea pigs with polydactyly are mated, 1/3 of the offspring have normal feet and 2/3 have polydactyly. Explain the inheritance pattern for both crosses.

3. When a guinea pig with polydactyly is mated with a guinea pig that has normal feet, one half of the offspring have polydactyly and one half have normal feet. If two guinea pigs with polydactyly are mated, 1/3 of the offspring have normal feet and 2/3 have polydactyly. Explain the inheritance pattern for both crosses.

Name: 3. When a guinea pig with polydactyly is mated with a guinea pig that
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: 3. When a guinea pig with polydactyly is mated with a guinea pig thathas normal feet, one half of the offspring have polydactyly and one halfhave normal feet. If two guinea pigs with polydactyly are mated, 1/3 ofthe offspring have normal feet and 2/

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

Section12.2: Later Modifications And Additions To Mendel’s Principles

Problem 2SB: A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit...

See similar textbooks

Similar questions

3. You perform a cross between two true-breedingstrains of zucchini. One has green fruit and the otherhas yellow fruit. The F1 plants are all green, butwhen these are crossed, the F2 plants consist of9 green : 7 yellow.a. Explain this result. What were the genotypes of thetwo parental strains?b. Indicate the phenotypes, with frequencies, of theprogeny of a testcross of the F1 plants.c. Describe the epistasis interactions observed.d. Suppose that the dominant alleles specify functional enzymes, and the recessive alleles are nonfunctional. Propose a biochemical pathway thatcould explain the gene interactions.e. Is it possible to cross two different pure-breedingyellow zucchini strains and obtain all green progeny? What would be the genotypes of the parentsand progeny? f. Assuming that wild-type zucchini are green, howwould you describe the phenomenon that occurredin the F1 of part (e)?
1. In pea plants, yellow color (Y) is dominant over green color (y). A yellow-colored pea plant is crossed with a green-colored pea plant. Half of their offspring is yellow-colored while the other half is green-colored.What is the genotype of the yellow-colored parent? YY O Yy yy The genotype cannot be determined. 2. A scientist discovered an unknown organism in a tropical rainforest. The organism has been identified to possess the following characteristics: (1) multicellular at some point of its life cycle; (2) feeds on decaying organic matter; and (3) has a cell wall made of chitin.Which Kingdom does the unknown organism likely belong to? Kingdom Animalia Kingdom Plantae Kingdom Fungi Kingdom Protista 3. Which statement about ferns is TRUE? Ferns are unicellular organisms. Ferns are nonvascular plants. O Ferns have spores as reproductive structures. Ferns are capable of secondary growth.
3. Short-tailed pup distribution. In mice, the dominant T allele results in a short tail. Homozygous T/T genotype is lethal, which means mouse embryos with this genotype die before they are born. Homozygous t/t is normal, with normal tail. A cross between two short-tailed mice produces a litter of 5 pups. a). What are the genotype(s) of the two short-tailed mice used in the cross? b). What are the possible genotypes and phenotypes of the 5 pups? What are their perspective ratio?
10. What phenotypes are expected and in what proportion from each of the following n crosses? (Assume D, G and Ware dominant over d, g and w, respectively.) 31 (a) DdGGww x DDGgWw how bon (b) ddggWw x DdGgww HD: (c) DdGgWw x DdggWw (d) DdGgWW x DdGgWW baildhalos 6 am bunjid-roloos (d) nomow sof bemam nam lemona (0) namnow beild-oloss of bemem nem tarono [b) int euogyson M 11. Radishes can be long, round or oval in shape. They may be red, white or purple in color. A long red variety was crossed with a round white variety. In the F₁ generation, all were oval purple. In the F2 generation, there were 8 long red, 15 long purple, 17 oval red, 31 oval purple, 7 long white, 15 oval white, 8 round red, 16 round purple and 9 round white. Explain the genetic basis of these results. hot tmsidorss endohes barlastis bed terftet ben hemouth bra (Jisi edohss srillo sonsmedni Snem ar to gaylonog ori ai fer msil) ov fa cisiv lemon diw be (!) 12. In shorthorn cattle, the allele for red coat color (R) is…
4. Albinism is caused bya recessive al lele. A brown rabbit crossed with an albino rabbit produces 12 brown offspring. When the albino rabbit is crossed with a second brown rabbit, 7 brown and 5 albino offspring are produced. What is the best explanation for this genetic situation? Write the genotypes of each of the parents and their offspring. A First set of parents First set of offspring Cenng to ri Second set of parents e 1:s!! A A Second set of offspring Sbl
2. In the following types of matings, the phenotypes of the parents are listed together with the frequencies of phenotypes occurring among their offspring. Indicate the genotype of each parent (you may need to use testcrossesl). Parents Offspring I B:0 을 A: 을B 을 AB : B: A: 0 를 AB : 를 A a. Вx В Ь. Ох АВ Ox AB Bx A d. Bx A C. TV Sex Lin ko
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
2. Show the cross and provide full justification in each case: a) An F1 x F1 self-fertilization gives a 9:7 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? b) An F1 x F1 self-fertilization gives a 9:3:4 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? c) An F1 x F1 self-fertilization gives a 15:1 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?
2. Show the cross and provide full justification in each case:a) An F1 x F1 self-fertilization gives a 9:7 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? b) An F1 x F1 self-fertilization gives a 9:3:4 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1? c) An F1 x F1 self-fertilization gives a 15:1 phenotypic ratio in the F2. What phenotypic ratio would you expect if you test-crossed the F1?
4. A different population of lemmings have a third allele (i.e. a third version of the same gene) for hair colour, the blue allele. a) When pure-breeding red-haired lemmings were crossed with pure-breeding blue haired lemmings, the offspring all had purple hair. Using appropriate genetic diagrams, explain the above result. b) Predict the offspring and their ratios if the purple-haired lemmings were crossed with one another.
5. In cattle, roan color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. When two roan cattle are crossed, the phenotypes of the offspring are found to be in the ratio of 1 red: 2 roan: 1 white. a) What cross could produce the highest percentage of roan cattle? b) How would one produce a herd of pure-breeding roan-color cattle? Explain
3. If the a and b loci are 40 cM apart and an AA BB individual and an aa bb individual mate:a. What gametes will the F1 individuals produce, andin what proportions? What phenotypic classes inwhat proportions are expected in the F2 generation(assuming complete dominance for both genes)?b. If the original cross was AA bb × aa BB, whatgametic proportions would emerge from the F1?What would be the result in the F2 generation?