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- parent genoty offspring genotypes. We can use this to figure out the probability of 1 How MANY HERITABLE TRAITS ARE USED IN DIHYBRID CROSS? 2. DIHYBRID CROSSES FOLLOW THE SAME RULES AS WHICH OTHER GENETIC DIAGRAM? Dunnet square S 3. How MANY OFFSPRING GENOTYPES ARE WORKED OUT IN A DIHYBRID CROSS? Emmatheteachie 2020 Dihybrid Crosses - Phenotypes LET'S CHECK IF YOU REMEMBER THE RULES FROM CREATING PUNNETT SQUARES! COMPLETE THE SENTENCES: Dominant alleles are represented with a letter. I'M THE BOS! Tt The capital letter is always written Each parent can only pass on allele for each gene. Recessive traits are only shown if both alleles are Now USE THE INFORMATION IN THE PICTURES BELOW TO WORK OUT THE PHENOTYPE FOR EACH GENOTYPE: Dominant traits Recessive traits Bubble fur (B) Spiky fur (b) Yellow body (M Pink body (y) BBYY = BbYy = Bbyy = bbYY= © Ermmotheleachie 2020Topic: Penetrance. Petal number is controlled by a single gene in merigonias. The gene has a completely dominant wild type allele F that makes a plant have five petals and a mutant recessive six petal allele(f). However the six petal trait is only 50% penetrant. You do the cross Ff x Ff. What fraction of the progeny do you have the 6 petals? what is the meaning for 50% penetrant.Practice with Crosses. Show all work! 6. A TT (tall) plant is crossed with a tt (short plant). a. What percentage of the offspring will be tall? 7. A Tt plant is crossed with a Tt plant. a. What percentage of the offspring will be short? 8. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). a. What percentage of the offspring will be homozygous (RR)? 9. A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. a. What percentage of the offspring will also be homozygous?
- Incomplete Dominance 1. In snapdragons, red flower color (R) is incompletely dominant over white flower color (r). The hybrids or heterozygous plants (Rr) are pink in color. a) Show the genotype for a white flower and for a red flower. b) If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes of the F1 generation plants? Show your work. c) What genotypes and phenotypes will be produced in the F2 generation? Show your work? the the o doa A t r th s beirs ard the phenorypic and wo ran aials pring fro d) How did the genotypic and phenotypic ratio compare to each other in this incomplete dominance cross? gonarypi and e) What would the phenotypic ratio have been if this had been complete dominance?. Jimsom. weed plants can produce purple or white flowers and spiny or smooth seed pods. A purple spiny plant is crossed with a white spiny plant. This cross produces: 89 purple spiny; 92 white spiny; 31 purple smooth and 27 white smooth plants. What are the genotypes of the parental plants and the progeny plants? Use the letters P/p for flower color and S/s for pod texture Parent #1 –genotype:_________________________________; Parent #2 –genotype: ______________________________ b. Offspring plants – genotypes and phenotypes c. Calculate the recombination frequency using these results_________________________________ i need help finding the right answer and i need an explation on how you got it so i understand and please do it with a punnet square and show the calutions step by stepNow cross two of the F₁ offspring. Parent 1 Gametes F2 Offspring Parent 2 Gametes 24. What is the phenotypic ratio in the F2 generation? 25. In the dihybrid cross you have considered two traits at a time. Although the number of traits has increased by one, what has happened to the number of possible phenotypes of offspring produced in the F2 generation? ni llit asa2013 bhidydenom sih at Simons 1:11 sabrax gatame
- Help mePlease answer everything with explanation. In The Day of the Triffids, after most people in the world are blinded by an apparent meteor shower, an aggressive species of alien plants (brought to earth on the meteors) starts attacking people. Some Triffids have a poison stingers, and some do not. 1. Two true-breeding Triffid strains (poison stingers and no stingers) are crossed. All F1 progeny have poison stingers. What proportion of the F1 will be true-breeding? 2. Two true-breeding Triffid strains (poison stingers and no stingers) are crossed. All F1 progeny have poison stingers. The F1 is selfed to produce an F2. What proportion of the F2 will be true-breeding? 3. Some Triffids have a poison stingers, and some do not. Some Triffids are orange, and some are purple. Poison stingers and orange color are dominant. A scientist crosses a purple plant with no stinger to an orange plant with a stinger that is homozygous for the poison stinger trait and heterozygous for the color trait. ....…incomplete dominance What is the phenotype of the plant with RR genotype? What is the color of a plant with R'R' genotype? What is the color of a plant with genotype RR'? A pink-flowered snapdragon was crossed with a white-flowered snapdragon. What is the probability of producing a pink-flowered plant? What cross will produce the most pink-flowered plants?
- 7-8. Assume that white color is dominant over yellow color in squash. If pollen from the anthers of a heterozygous white-fruited plant is placed on the pistil of a yellow- fruited plant, show using ratios the genotypes and phenotypes you would expect the seeds from this cross to produce. Genotypes = 1/2 Ww 1/2 Ww = 1:1 ratio | Phenotypes = All white = 1:0 ratio Genotypes = 1/2 WW 1/2 ww = 1:1 ratio | Phenotypes = 1/2 white 1/2 yellow = 1:1 ratio Genotypes = 3/4 Ww 1/4 ww = 1:1 ratio | Phenotypes = 3/4 white 1/4 yellow = 1:1 ratio Genotypes = 1/2 Ww 1/2 ww = 1:1 ratio | Phenotypes = 1/2 white 1/2 yellow = 1:1 ratioOne Trait (Monohybrid) Crosses-Complete Dominance 1. In peas, inflated pod is dominant over wrinkled. If a homozygous inflated pod plant is crossed with a homozygous wrinkled pod plant, what will be the F₂ phenotypic ratio? 2. A tall pea plant crossed with a dwarf pea plant produces offspring of which about half are tall and half are dwarf. What are the genotypes of: a. the tall parent b. the dwarf parent 3. What does "test cross" or "backcross" mean?School - Dan. AClassroom What's Your Guardi. V Authentic Italian Re YouTube ver sheet ☆回 Add-ons Help Last edit was seconds ago BIUA Times New... - 14 1 .1 2 II| 4 5 Phenotype: % Go To Next Page 4. Cross a Green flower (YB) with another green flower. Y = yellow, B = Blue. Is this a codominant or an incomplete dominance problem? What is the probability of the offspring genotypes and phenotypes? (Use a Punnett Square and make a table as seen in the problems above to give genotypes and phenotypes) Genotype: edu gear lii lilı