Q6. Guinea pigs, which were homozygous for long, black hair were crossed with ones whichwere homozygous for short, white hair. All the F1 offspring had short, black hair.(a) Using suitable symbols, draw a genetic diagram showing parents genotypes, to explainthis result in F1 offspring.(b) Complete the Punnett square to show the results of interbreeding the F1 offspring.Gametes (c) Complete the following table to show the differentphenotypes you would expect in theF2 and their ratio.PhenotypeRatio(d) State the ratio of phenotypes expected in the F2 offspring.(e) Mendel's Second Law of inheritance states that, "during gamete formation thesegregation of each gene pair is independent of other pairs." How do the diagramsabove prove this law? (AC 2.4).

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Q6. Guinea pigs, which were homozygous for long, black hair were crossed with ones which were homozygous for short, white hair. All the F1 offspring had short, black hair. (a) Using suitable symbols, draw a genetic diagram showing parents genotypes, to explain this result in F1 offspring. (b) Complete the Punnett square to show the results of interbreeding the F1 offspring. Gametes

Q6. Guinea pigs, which were homozygous for long, black hair were crossed with ones which were homozygous for short, white hair. All the F1 offspring had short, black hair. (a) Using suitable symbols, draw a genetic diagram showing parents genotypes, to explain this result in F1 offspring. (b) Complete the Punnett square to show the results of interbreeding the F1 offspring. Gametes

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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Q6. Guinea pigs, which were homozygous for long, black hair were crossed with ones which were homozygous for short, white hair. All the F1 offspring had short, black hair. 14)Using suitable symbols, draw a genetic diagram showing parents genotypes, to explain this result in F1 offspring. I
10. A population geneticist collected 400 deer mice from the wild. All have normal ears. She raised about 800 animals in each of the following four generations (random mating) and found that all except one male in the fourth generation had normal ears. This male was earless but was otherwise wild-type and fertile. (a) Suggest 3 possible causes that could lead to the appearance of this earless male. (b) What kinds of experimental crosses would you carry out to distinguish between these three alternatives?
2. Determine the genotypes, phenotypes, genotypic ratio, and the phenotypic ratio of the following tri-hybrid cross. A male having genotype AABbCc mates with a female having genotype AaBbcc. Wherein: (A) (B) (C) is Long nose and (a) is flat nose is attached earlobes and (b) is unattached earlobes is thick eyebrow and (c) is thin eyebrow
făctőrs suc 19) The genotype of a black snake is unknown. Black is a dominant allele, so the snake could be either BB or Bb. You cross this snake with a white snake (bb). Which of the following results of that cross would support the unknown genotype of the black snake being a homozygote? A) All F1 offspring are white B) All F1 offspring are black C) Half of the F1 offspring are white, the other half are black D) Three-quarters of the F1 offspring are black, the other quarter are white В x bb the
3. Determine the genotypes, phenotypes, genotypic ratio, and the phenotypic ratio of the following tri-hybrid cross. A male having genotype aaBBCC mates with a female having genotype AaBbCc. Wherein: (A) (B) (C) is Straight hair and (a) is curly hair is Tall and (b) is short is Long nose and (c) is flat nose
9. Please determine whether the allele responsible for the trait is dominant or recessive. (A) (B) 1 2 10.For a cross between a female color blind carrier and a male color blind person, what is the probability for the female offspring to be color blind? What is the probability for the male offspring to be color blind? Please explain. 11.Consider the genetic map shown below AD Which two alleles have the highest recombination frequency? Which two have the lowest recombination frequency? O Focus ! 72°F DELL F5 F6 PrtScr Insert Hor FZ F8 F9 F10 F11 F12 23 %24 3. 4. 8 E R T
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
Q5. When Mendel crossed a large number of tall pea plants with short pea plants, all F1 plants were tall. The F2 generation was created by self-pollinating the F1 plants. (a) Complete a genetic cross of F1 to show the genotypes and phenotypes of the parents and offspring. (b) Complete a genetic cross of F2 to show the genotypes and phenotypes of the offspring. (c) State the ratio of phenotypes expected in the F2 offspring. (d) Mendel's First Law of inheritance states that, “...the alleles of a given locus segregate into separate gametes." Explain how the genetic diagram above proves this law. (AC 2.1)
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?
3) When a rabbit breeder crossed an agouti with a Himalayan, the litter contained equal numbers of agouti and Himalayan offspring. She picked one of the agouti and one of the Himalayan offspring and mated them, and was surprised when the litter also contained an albino. Explain these observations using genetic diagrams.
20. 20.Which among the following statements is INCORRECT? A. Codominance is evident when a cross between organisms with two different phenotypes produces offspring that exhibits both parental traits because the alleles for each trait are neither completely dominant nor recessive B. Incomplete dominance is evident when a cross between a white carnation and a red carnation results in a pink carnation flower. C. Law of dominance state that if the alleles of a specific gene differ from each other, only one phenotype will be expressed while the other is masked D. The inheritance of one trait does not affect the inheritance of the other trait especially if the allele of the other trait is located in a different chromosome
. As we learned in this chapter, the white mutation ofDrosophila studied by Thomas Hunt Morgan isX-linked and recessive to wild type. When truebreeding white-eyed males carrying this mutationwere crossed with true-breeding purple-eyed females,all the F1 progeny had wild-type (red) eyes. When theF1 progeny were intercrossed, the F2 progeny emergedin the ratio 3/8 wild-type females: 1/4 white-eyedmales: 3/16 wild-type males: 1/8 purple-eyed females:1/16 purple-eyed males.a. Formulate a hypothesis to explain the inheritanceof these eye colors.b. Predict the F1 and F2 progeny if the parental crosswas reversed (that is, if the parental cross wasbetween true-breeding white-eyed females andtrue-breeding purple-eyed males).