Using Mendel’s lines of peas, describe how you would use a test cross experimental design to determine the genotype of a pea plant with purple flowers. Be very specific in describing your experimental design and how you would interpret your results based on the proportion of offspring phenotypes. Make sure to include all possible offspring phenotypes in your answer and what the proportion of phenotypes tells you about the purple plant genotype.

Using Mendel’s lines of peas, describe how you would use a test cross experimental design to determine the genotype of a pea plant with purple flowers. Be very specific in describing your experimental design and how you would interpret your results based on the proportion of offspring phenotypes. Make sure to include all possible offspring phenotypes in your answer and what the proportion of phenotypes tells you about the purple plant genotype.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 5RQ: Imagine that you are performing a cross involving seed texture in garden pea plants. You cross...

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Height among red stalk plants is divided into tall, medium and short. From tests, scientists know it is governed by two alleles of the same gene. It is known that tall plants and short plants are homozygous. What is the genotype of the medium plant? Explain your reasoning in one to two sentences. A cross between a medium plant and a tall plant occurs. What would be the genotypes? Show your work/explain your reasoning. Can medium plants be true breeding (i.e. be bred with other medium plants to ALWAYS produce medium plants)? Explain your reasoning. étv MacBook Pro %23 $ & * 3 4 5 7 8. T Y D F H. J
SEATWORK Symbols (for pea plant traits): • T: Tall t: short Analyze the following problems. Determine the possible genotypes, genotypic ratio, phenotypes, and phenotypic ratio from the genetic cross. Show your solution through a Punnett square. Use the symbols provided. • R: Round seeds r: wrinkled seeds • Y: Yellow seeds y: green seeds • P: Purple flower p: white flower 1) Cross a homozygous dominant tall and homozygous round seed pea plant with a heterozygous tall and heterozygous round seed pea plant. 2) Cross a pea plant that is heterozygous for purple flowers and homozygous dominant for yellow seeds with a pea plant that is heterozygous for purple flowers and homozygous recessive for green seeds. 3) Cross a pea plant that is short and has green seeds with a pea plant that is heterozygous tall and has heterozygous yellow seeds.
The best way to determine the genotype for a plant presenting with dominant phenotypes is by performing a test cross. Test crosses are always performed with a true-breeding plant with recessive traits. What would be the phenotype and genotype of the plant you would need to perform the test-cross with your tall, purple plant?After performing the test-cross with your unknown purple, tall plant you find that all your resulting plants are tall; half have white flowers, and half have purple flowers. What was the genotype of your original purple, tall plant?
Use the following information to answer the next question. A Venn Diagram Showing the Relationship Between Oogenesis and Spermatogeneis. Oogenesis 1 NOTE: Similarities are represented by area 2. Differences are represented by areas 1 or 3. Match the numbered regions with the descriptions below. Spermatogenesis 3 Four viable gametes produced: Occurs in gonads: Daughter cells equal in size Unequal cytoplasmic division ▶
Use the following information to answer the next question. Some Traits in Garden Pea Plants In pea plants, the genes for seed shape, seed colour, and plant height demonstrate independent assortment. The alleles for these genes are symbolized as follows: R (round) >r (wrinkled) Y (yellow) > y (green) Answer: Seed shape Seed colour - Plant height T (tall) > t (short) What percentage of the gametes produced by a pea plant heterozygous for both seed shape and seed colour would be expected to contain both the allele for wrinkled and the allele for green? (Record your answer as a whole number. Do not include the percentage sign)
In this program, you are provided with phenotype pair counts of F2 offspring at two research institutes. The key different between this work and previous work is that now we consider two genes instead of one. The phenotype pairs are the (shape, color) of peas from a pea plant. It turns out that there are two separate genes that code for these phenotypes. We shall call them Shape and Color. Gregor Mendel originally recorded these experiments in green peas. Using the notation: R = Round (dominant) allele at Shape gene; r = Wrinkled (recessive) allele at Shape gene; Y = Yellow (dominant) allele at Color gene; y = Green (recessive) allele at Color gene; then the shape and color of any pea can be determined by studying the genotypes at each gene. It turns out that, when one mates a plant that is homozygous for the dominant alleles (RRYY) with a plant that is homozygous for the recessive alleles (rryy), the F1 generation are heterozygous at both genes, as with a single gene disorder.…
You identify a gene that determines the size of the pods of a pea plant. To study the phenotype associated with this trait, you cross a plant that is homozygous for the “long pod” allele with a pea plant that is homozygote for “short pod” allele. When measuring the length of the pods of the parents and resulting offspring, you obtain the following data: Plant Length (cm) Homozygous (“Wide” allele) 15 cm Homozygous (“Short” allele) 4 cm Resulting cross breed 9 cm What can you conclude about this phenotype/trait? Long and short alleles are codominant Wide allele shows incomplete dominance over the short allele Wide allele shows complete dominance over the short allele Short allele shows complete dominance over the long allele The wide and short genes are linked
[ Choose ] The F1 population produced flowers in a 3:1 ration of dominant to recessive traits. The F2 population produced flowers in a 3:1 ration of dominant to recessive traits. Mendel cross-bred F1 plants with F2 plants. Mendel labeled the offspring of the first plants bred F1, for the first filial generation Mendel crossed two identical, true-breeding plants for a particular characteristic. Mendel cross-bred F1 plants with each other. Mendel crossed two contrasting true-breeding plants with two different traits for a given characteristic. Mendel labeled the offspring of the first plants bred F1, for the first flower generation.
For many students, calculating the chi square value is the most challenging part of conducting a chi square test so it is important to practice. Consider the following information: An F1 tall, round seed pea plant is crossed with a dwarf, wrinkled seed pea plant. The following offspring are observed: Tall, round: 510 Tall, wrinkled: 495 Dwarf, round: 490 Dwarf, wrinkled: 505 a. What is the expected phenotype ratio? #:# or #:#:#:#, depending on what you think the answer is. b. What is the calculated chi-square value? Format your answer with 1 significant digit (i.e. 0.#). c. What is the critical chi-square value from the table provided in the book at the P=0.05 level of significance? Enter the number exactly as shown in this table.
Mendelian Genetics F2 Cross: Yellow, Round x Green, Round GgWw x ggWW Character: Pea color & shape Use Punnett square and fork-line method to check the possible offspring. Show and interpret all the possible genotypes and phenotypes of the offsprings
Gregor Mendel followed specific steps when breeding pea plants to determine the underlying cause and mathematical ratio of specific traits. Drag and drop the four tiles that describe the order of his process and findings. 1 Mendel crossed two identical, true-breeding plants for a particular characteristic. :: Mendel crossed two contrasting true-breeding plants with two different traits for a given characteristic. ::: Mendel labeled the offspring of the first plants bred F1, for first flower generation. Mendel labeled the offspring of the first plants bred F1, for first filial generation. ::: Mendel cross-bred F1 plants with F2 plants. ::: Mendel cross-bred F1 plants with each other. The F2 population produced flowers in a 3:1 ratio of dominant to recessive traits. The F1 population produced flowers in a 3:1 ratio of dominant to recessive traits. DELL & 6 7 1 8 9. 2 e
Monohybrid Crosses and Punnett Squares Punnett squares are diagrams that can be used to predict the offspring that could result from combination of the gametes produced by two parents (or an organism that can self-) The from the gametes of one parent (eg, eggs) are placed on one axis of the Punnett square while alleles from the gametes of the other parent (egsperm) are placed on the other 1. Pea plants have two alleles for height T is the dominant allele and produces tall plants recessive allele and produces short plantsConsider two parental pea plants each have the genot and answer the following questions aWhat type of gametes can a plant with genotype produce? bAssign the maternal gametes to one axis in the Punnett square at right Assign the paternal gametes to one axis in the Punnett square at night Copyright 2017 Pearson Education