Problem 1. A male black (BB) and polled (PP) Angus is crossed with a female black (BB) and horned (pp) Angus. Give the phenotypic and genotypic ratio of their F1 offspring. Problem 2. If the F1 in Problem 1 is inter se mated, what are the possible phenotypic and genotypic ratios of their offspring? Please Show your answer In punnet square and step by step solution
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- Problem 1: A pet storeowner mated two guinea pigs with the following results 22 black offspring 5 white offspring He then mated two of the black offspring and got the following results: 16 black offspring 3 white offspring What is the genotype of the parents used in the first cross? What is the genotype of the parents used in the second cross? What is the chance of obtaining a totally homozygous offspring in the second cross? If the white offspring were crossed with the original parents, what would be the probability of obtaining white offspring? What would be the chance of obtaining a homozygous black offspring?Problem 2: In summer squash, white fruit is dominant to yellow, and flat fruit is dominant to round. The selected parents are a plant with white-flat fruit (homozygous) and a plant with yellow-round fruit. Carry this cross through the F₂ generation. List phenotypic ratio for the F, generation. Problem 3: Persian cats have the dominant gene for black coat and the recessive gene for long hair. Siamese cats have the recessive gene for tan coat and the dominant gene for short hair. A pure-breeding black, long hair Persian cat is mated with a pure-breeding tan, short hair Siamese. Calculate the F, and F₂ generations. List the phenotypic ratio for the F₂ generation. Show your calculations in the space below.PROBLEM 2: A homozygous red flowered plant (RR) is crossed with a homozygous white plant (rr). Justify your answer by using Punnett Square. a. What are the genotypes and phenotypes of the offspring? b. What are the phenotypes and genotypes of the offspring? c. What is the probability of having a white flower? d. What is the probability of having a red flower? e. PUNNETT SQUARE
- Instructions: Answer the following problem using the punett square and identify its Genotypic ratio and Phenotypic ratio. 1. A homozygous round-seeded plant (RR) is crossed with a homozygous wrinkle-seeded plant (rr). What is the phenotypic and genotypic ratio of their offspring? Genotypic Ratio Phenotypic Ratio- 2. A heterozygous green-colored pod (Gg) is crossed with a yellow-colored pod (gg). Predict the Genotypic and Phenotypic ratio of their offspring. Genotypic Ration Phenotypic RationPROBLEM 3: Using the Punnett square, determine the different combination of gametes with the genotypes G9MM (paternal) and ggmm (maternal). G is dominant for having a widows peak and g is recessive for not having a widow's peak. M is dominant for having the ability to roll the tongque and m is recessive for not having the ability to roll the tongue. Determine the following: a. What are the offsprings phenotype: b. What are the offsprings genotype: c. Probability of widow's peak and can tongue roll d. Probability of offspring with no widow's peak but can roll its tonque e. PUNNETT SQUAREThe second parental (P2)cross using a Punnett square Male Female Gg gg G GG Gg Because the P1 and P2 crosses consider the inheritance of only one character, seed color, they are called monohybrid crosses. Activity 3. SELF- CHECK 1. Windows peak (S) is dominant over straight hairline (s). Given that the mother has heterozygous gene pair for window's peak and the father has straight hairline. a. What is the genotype of the mother? b. What is the genotype of the father? C. How many kinds of gametes can the mother produce? List them down. d. How many kinds of gametes can the father produce? List them down. e. Perform a cross using a Punnett square. f. Give the genotypic ratio of the cross g. Give the phenotypic ratio of the cross
- For all of the testcross problems, indicate parental phenotypes, genotypes and gametes; indicate genotypes and phenotypes off offspring. Show your work on a separate sheet(s) of paper! I. Complete Dominance House mice have two coat colors; gray (agouti, or wild type) and black. When true-breeding gray mice are crossed with true-breeding black mice, the F1 generation are all gray. In the F2 generation there are three gray to one black (3/4 gray : 1/4 black). Diagram the F1 cross, using G = gray, g = black. What genotypic and phenotypic ratios would you expect if you crossed a pure breeding gray mouse with a heterozygous mouse? Two gray mice with unknown ancestry are crossed. Can you determine from the phenotypes of their offspring if the parents are homozygous or heterozygous? Explain how.Dihybrid Basics TT or Tt = tall tt = short GG or Gg = green gg = white 1.) A tall green pea plant (TTG9) is crossed with a tall green pea plant (TtGg) FOIL each parent’s genotypes: tall green pea plant (TTGg) short white pea plant (TtGg) How many of the 16 offspring are: tall & green tall & white short & green short & whiteBackground Problem N° 6 Objective: To illustrate the differences between the dominant/recessive model vs. partial (or incomplete) dominance model. In incomplete dominance, the phenotype is neither dominant nor recessive, but intermediate instead. a. Explain why a monohybrid cross of snapdragon plants carrying white flowers with red-flowered plants produces all pink flowers in the F1 generation. [Hint: What makes flowers red, purple, yellow, etc.?] b. What are the genotypic and phenotypic ratios of snapdragon flowers in the F2 generation? True breeding individual = Homozygous for either trait.
- Problem Set: Sex Linkages A. Answer the following problems. 1. Complete a Punnett Square for the cross between a human female (XX) and a human male (XY). What is the chance that the parents will have a girl? ANSWER: 2. If the same parents have four boys, what is the probability their fifth child will be a girl.There is also another follow up question can you help me with this too please In the second cross, a full colour rabbit (CCa) is mated to a light grey rabbit (CchCa). Calculate the theoretical probability of this cross producing each of the following phenotypes shown below. Record your answer as a full percentage for each phenotype in order as shown below. Record your answer as a full percentage for each phenotype in the order shown below. Match the phenotype with percentage. Percentages can be used multiple times. 1, Full color 1,0 2, albino 2,25 3, LIght grey 3,50 4,Hamiliyan 4,75 5,CHichinian 5,100BLACK VESTIGIAL DIHYBRID TESTCROSS In the parental generation, you mate a pure-breeding wild-type female (bl+/blt.vg+/vg+) with a pure-breeding black, vestigial (bl/bl vg/vg) to produce an F1 generation that is all wild-type (bl+/bl vg+/vg). Note that the F1 flies are all dihybrid. Next, you mate several F1 dihybrid females (bl+/bl vg+/vg) with tester males, which are black, vestigial (bl/bl;vg/vg). The offspring of this dihybrid testcross are: Phenotype Genotype Tester Gamete Dihybrid Gamete Number 440 Wild-type 394 108 135 Black, vestigial Vestigial Black Copy the table into your notes and derive the dihybrid gametes following the example in the previous section. The columns in blue (phenotypes and numbers of offspring) are what you can see and count. The genotypes of the testcross offspring (orange) must be deduced from the phenotypes and knowing that the tester contributed bl vg gametes. Finally, you can deduce the dihybrid gametes (green) by subtracting the tester gamete…