Which of the following statements are true regarding Mendel's observations of single factor crosses? All F2 offspring exhibit the dominant phenotype 314 of F1 offspring exhibit the dominant phenotype 3/4 of F2 offspring exhibit the dominant phenotype The segregation of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. The independent assortment of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. All F1 offspring exhibit the dominant phenotype

Which of the following statements are true regarding Mendel's observations of single factor crosses? All F2 offspring exhibit the dominant phenotype 314 of F1 offspring exhibit the dominant phenotype 3/4 of F2 offspring exhibit the dominant phenotype The segregation of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. The independent assortment of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. All F1 offspring exhibit the dominant phenotype

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Description: Which of the following statements are true regarding Mendel's observations of single factor crosses?All F2 offspring exhibit the dominant phenotype3/4 of F1 offspring exhibit the dominant phenotype3/4 of F2 offspring exhibit the dominant phenotypeTh

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 2ACQ: Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are...

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Use a branch diagram to determine all the phenotypes and corresponding ratios that are expected to occur among the offspring of the following Mendelian cross; d d E e F f X D D e e Ff. Assume incomplete dominance for D, E and F. Hint: are phenotypes and genotypes the same or different in this case?
Mendelian ratios are modified in crosses involving autotetraploids.Assume that one plant expresses the dominant trait greenseeds and is homozygous (WWWW). This plant is crossed to onewith white seeds that is also homozygous (wwww). If only onedominant allele is sufficient to produce green seeds, predict theF1 and F2 results of such a cross. Assume that synapsis betweenchromosome pairs is random during meiosis.
Which of the following statements is true about the molecular basis of Mendel's second law? OThe random attachment of the sister chromatids and the split of them into different daughter cells during the second round of cell division in Meiosis ensure Mendel's second law of independent assortment of alleles. OThe random attachment of the sister chromatids and the split of them into different daughter cells during the first round of cell division in Meiosis ensure Mendel's 2nd law. O The molecular basis of independent assortment of alleles is the segregation of sister chromatids during the second round of cell division in Meiosis. O The molecular basis of independent assortment of alleles is the segregation of homologous chromosomes during the second round of cell division in Meiosis. O The molecular basis of independent assortment of alleles is the segregation of homologous chromosomes during the first round of cell division in Meiosis.
In radishes, flower colors may be red, purple, or white. The edible portion of the radish may be long or oval. When only flower color is studied, no dominance is evident, and red 3 white crosses yield all purple. If these F1 purples are interbred, the F2 generation consists of 1/4 red: 1/2 purple: 1/4 white. Regarding radish shape, long is dominant to oval in a normal Mendelian fashion. a. Determine the F1 and F2 phenotypes from a cross between a true-breeding red, long radish, and a radish that is white and oval. Be sure to define all gene symbols at the start. b. A red oval plant was crossed with a plant of unknown genotype and phenotype, yielding the following offspring:103 red long: 101 red oval98 purple long: 100 purple oval Determine the genotype and phenotype of the unknown plant.
Using the concepts of non-mendelian genetics, what is the phenotypic ratio of the offspring if two heterozygous pea plants with purple flowers are crossed together? O 3 pea plants with light purple flowers: 1 pea plant with a single mixed color for white and purple color. O 3 pea plants with purple flowers: 1 pea plant with light violet flowers. O 1 pea plant with purple flowers: 2 pea plants with white flowers: 1 pea plant with mixed color for white and purple color. O 1 pea plant with purple flowers: 2 pea plants with light purple flowers: 1: pea plant with white flowers.
A cross is performed between a pure-breeding pea plant with round and yellow seeds and a pure-breeding pea plant with wrinkled and green seeds. All F1 progeny have round and yellow seeds. The F1 plants are self-crossed. The following results are observed in the resultant F2 generation: 65 round and yellow, 42 round and green, 50 wrinkled and yellow, and 45 wrinkled and green. Use a Chi Square analysis to determine whether these traits follow Mendel’s law of independent assortment. Show all calculations.
Mendel crossed peas having round seeds and yellow cotyledons with peas having wrinkled seeds and green cotyledons. All the F1 plants had round seeds with yellow cotyledons. Diagram this cross through the F2 generation, using both the Punnett square and forked-line methods.
When Mendel crossed in his P generation a yellow-seeded and green-seeded pea plants, all the offspring were yellow seeded. When he took these F1 yellow-seeded plants and crossed them with the original yellow-seeded plant from the P generation, what genotypic ratio was expected? Group of answer choices 1:2:1 3:1 1:1:1:1 1:1
On the basis of Mendel’s observations (i.e. Mendelian patterns), predict the results from the following crosses with peas. Show the results in terms of genotypes, phenotypes, and their proportions in the offspring. The progeny of a tall (dominant and homozygous) variety crossed with a dwarf variety. The progeny of (a) self-fertilized. The progeny from (a) crossed with the original tall parent. The progeny of (a) crossed with the original dwarf parent.
Considering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring. Parental Plants Offspring tall, violet x tall, white 3/8 tall, white 3/8 tall, violet 1/8 dwarf, violet 1/8 dwarf, white Select the one best answer. DDWW x DDww DdWw x Ddww DDWW x Ddww DDWw x DdWw DdWw x ddWw
Mendel crossed two Pea plants for plant height and flower color Tall plant (T) is dominant to Short Plant (t). Purple Flower (P) is dominant to white flower (p). Using the following information perform the dihybrid cross using punnett squares that will predict all possible genotypes of the offspring and list the number and description of the phenotypes of the offspring. A. One plant homozygous dominant for plant height and flower color crossed with another plant homozygous recessive for plant height and heterozygous for flower color.
How can you tell whether or not there are blue kernels? The Y was dominant. Set up and complete a Punnett square for a cross of two of the F1 from Step 1 (above). Answer these questions: What are the genotypes of the F2 generation? YY, Yy, yy What are their phenotypes? YY, Yy(yellow) , yy(blue) Are there more or fewer blue kernels than in the F1 generation? F2 generation has more blue kernels than F1. Identify the four possible gametes produced by the following individuals (Y = yellow, y = blue, S = smooth, s = wrinkled): YY Ss: YS Ys YS Ys Yy Ss: YS Ys yS ys Create a Punnett square using these gametes as P1 and determine the genotypes of the F1. YS Ys YS YYSS YYSs Ys YYSs YYss yS YySS YySs ys YySs Yyss What are the phenotypes? What is the ratio of those phenotypes? The phenotypes would be: (a) Yellow with smooth (b) Yellow with wrinkled 3:1…