) Both parents in generation I have orange-brown fur. However in generation II, only one cub has orange-brown fur and the other two have white fur. Explain why this is so. b) Describe the possible genotype of tiger B
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a) Both parents in generation I have orange-brown fur. However in generation II, only one cub has orange-brown fur and the other two have white fur. Explain why this is so.
b) Describe the possible genotype of tiger B
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- Several alleles affect traits of roses, such as plant form and bud shape. Alleles of one gene govern whether a plant will be a climber (dominant) or shrubby (recessive). All F1 offspring from a cross between a true-breeding climber and a shrubby plant are climbers. If an F1 plant is crossed with a shrubby plant, about 50 percent of the offspring will be shrubby; 50 percent will be climbers. Using symbols A and a for the dominant and recessive alleles, make a Punnett- square diagram of the expected genotypes and phenotypes the cross between the F1 offspring and the shrubby plant.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?The phenotype of individuals heterozygous for ________ alleles comprises both homozygous phenotypes. a. epistatic b. codominant c. pleiotropic d. hybrid
- In sweet pea plants, an allele for purple flowers. (P) is dominanl when paired with a recessive allele for red flowers (p). An allele for Jang pollen grains (L) is dominant when paired with a recessive allele for round pollen grains (L). Bateson and Punnett crossed a plant having purple flowers and long pollen grains with one having white flowers and round pollen grains. All F1 offspring have purple flowers and long pollen grains. Among the F2 generation, the researchers observed the following phenotypes: 296 purple flowers/long pollen grains 19 purple /lower/ round pollen grains 27 red flowers/long pollen grains 85 red flowers/round pollen grains What is the best explanation for these results?The phenotype of individuals heterozygous for ________ alleles comprises both homozygous phenotypes. a. epistatic b. codominant c. pleiotropic d. hybridChoose 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.
- 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 Sbl1 pts The pedigree below shows the expression of Huntington's disease in a family. Huntington's disease is a fatal genetic disorder that causes the progressive breakdown of nerve cells in the brain. It deteriorates a person's physical and mental abilities usually during their prime working years and has no cure. Huntington's is inherited as a dominant allele (H). Examine the pedigree below and determine the genotype for individual "2" DODO0O 2. O HH O Hh О h O either HH or Hh10. Horn length in the Sable antelope of Africa involves recessive epistasis. Gene Lcontrols the length of the horns. LLC_ have very long horns, LlC_ have medium sized horns, and llC_ have short horns. Antelope with no horns are always __cc. How would you deduce the genotype of a hornless antelope? cross two hornless antelope together you cannot deduce the genotype with a single breeding experiment cross it with an antelope of genotype llCC. cross it with an antelope of genotype llcc
- 1. In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the dominant allele and eindicates the recessive allele. The cross between a male wild-type fruit fly and a female white-eyed fruit flyproduced the following offspring.Wild-typeMaleWild-typeFemaleWhite-eyedMaleWhite-eyedFemaleBrown-eyedFemaleF1 0 45 55 0 1The wild-type and white-eyed individuals from the F1 generation were then crossed to produce the followingoffspring.F2 23 31 22 24 0(a) Determine the genotypes of the original parents (P generation) and explain your reasoning. You may usePunnett squares to enhance your description, but the results from the Punnett squares must be discussed inyour answer.(b) Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Showall your work and explain the importance of your final answer.(c) The brown-eyed female in the F1 generation resulted from a mutational change. Explain what a mutation is,and discuss…Date Name Punnett Square Practice Worksheet 1) For each of the genotypes (AA, Aa or aa) below determine what the phenotype would be. Purple flowers are dominant to white flowers. PP Pp PP Hairy knuckies are dominant to non-hairy knuckles in humans. Hh hh HH Bobtails in cats are recessive. Normal tails are dominant. Tt tt TT 2) For each of the following write whether it is homozygous dominant, heterozygous or homozygous recessive. AA gg Pp Ii TT Use the following information for questions 3-5: In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. 3) The female dog is heterozygous. The male dog is homozygous recessive. Figure out the percentage or ratio of possible phenotypes and genotypes of their puppies by using a Punnett Square. Plae the oileles for the mule parent helm One alele n e h lie: % of possible Genotypes: FF Plar the alfele f he emle p r ti side One elleir on ch tine Ff: % of possible…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 (