A farmer is interested in a novel colour pattern in beans. This trait is controlled by a single autosomal gene (Gene G) with two alleles. The G-allele results in a striped bean, while the recessive g-allele causes a brown bean. The farmer has a plant that has striped beans. Can you suggest how the farmer can determine the genotype (GG or Gg) of his bean plant in a single cross? Describe this cross and provide details on how you would interpret the results

A farmer is interested in a novel colour pattern in beans. This trait is controlled by a single autosomal gene (Gene G) with two alleles. The G-allele results in a striped bean, while the recessive g-allele causes a brown bean. The farmer has a plant that has striped beans. Can you suggest how the farmer can determine the genotype (GG or Gg) of his bean plant in a single cross? Describe this cross and provide details on how you would interpret the results

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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A farmer is interested in an interesting colour in his lilies. Colour in lilies is controlled by a single autosomal gene (Gene H) with two alleles. The H-allele results in a purple flower, while the recessive allele results in a white flower. The farmer has a plant that has purple flowers. Can you suggest how the farmer can determine the genotype (HH or Hh) of his purple flowered plant in a single cross? Describe this cross and provide details on how you would interpret the results.
A breeder is interested in a new coat colour in mice. This trait is controlled by a single autosomal gene (Gene T) with two alleles. The T-allele results in a yellow coat colour, while the recessive allele causes a cream coat colour. The breeder has a yellow mouse. Can you suggest how the breeder can determine the genotype (TT or Tt) of his mouse in a single cross? Describe this cross and provide details on how you would interpret the results.
Stem length in plants is controlled by two CODOMINANT alleles of one autosomal - one allele, B, adds 2 cm to the length of the plant, and another allele, b reduces length by 0.5 cm. The base length of the plant's stem is 10 cm. A plant breeder wants to breed plants that are exactly 14.5 cm in stem length. He starts with crossing two heterozygotes, Bb x Bb. gene Assuming that you can ONLY breed plants of the same stem length, what cross(es) would the breeder have to set up in order to achieve this? Let's (i) (ii) that stem length segregates independently from flower color (also a say monogenic, autosomal, biallelic trait). If you crossed a homozygote from (i) i.e. a bb and homozygote red flowers with a plant that is homozygote BB and homozygote white flowers, intercross the F1, and observe the following numbers of progeny in the F2 generation: (iii) Height Flower Color Observed Number 14 cm Red 2 14 cm 14 cm Pink White 11.5 cm Red 7 11.5 cm Pink 13 11.5 cm White 6. 9 cm Red 9 cm Pink 6.…
Two pure-breeding lines of petunia plants are crossed. Line 1 plants grow to a height of 54 cm, and Line 2 plants grow to a height of 18 cm. Petunia plant height is controlled by three genes, A, B and C. Line 1 has the genotype A₁A₁B₁B₁C₁C₁, and line 2 has the genotype A2A2B₂B₂C₂C₂. Assume that genotype alone determines plant height under ideal growth conditions and that the alleles of the three genes are additive. If the F1 plants are self crossed, what is the expected proportion of F2 plants with the genotype A₁A₁B₁B₁C₁C₁ 1/8 1/32 1/16 1/4 1/64
Fruit fly body color is wild type (meaning normal) Gray = B+ and black = b Fruit fly wing type is wild type normal wings = vg+ and vg = vestigial A fly which was heterozygous for both traits was crossed with a fly that was recessive for both traits. Write the genotype and phenotype that would be expected from this cross. Write the genotype and phenotype percentages that would be expected from this cross.
A plant geneticist is examining the mode of inheritance of flower color in two closely related species of exotic plants. The first species may have two pure-breeding lines—one produces a distinct red flower; and the other produces flowers with no color at all, or very pale yellow flowers. However, she cannot be sure. A cross of these varieties produces all pink-flowered progeny. The second species exhibits similar pure-breeding varieties; that is, one variety produces red flowers; and the other produces an albino or very pale yellow flower. A cross of these two varieties, however, produces orange-flowered progeny exclusively. Analyze the mode of inheritance of flower color in these two plant species.
Colored aleurone in the kernels of corn is due to the dominant allele R. The recessive allele r, when homozygous, produces colorless aleurone. The plant color (not the kernel color) is controlled by another gene with two alleles, Y and y. The dominant Y allele results in green color, whereas the homozygous presence of the recessive y allele causes the plant to appear yellow. In a testcross between a plant of unknown genotype and phenotype and a plant that is homozygous recessive for both traits, the following progeny were obtained: colored, green 88 colored, yellow 12 colorless, green 8 colorless, yellow 92 Explain how these results were obtained by determining the exact genotype and phenotype of the unknown plant, including the precise arrangement of the alleles on the homologs.
A cross like this (between two individuals heterozygous for two traits) is often referred to as a "two-point test cross". The expected ratio of phenotypes if the two traits are caused by unlinked genes displaying simple Mendelian dominant inheritance is 9:3:3:1. For this ratio, match each term of the ratio with the appropriate phenotype Wrinkled and green peas 1. 9 Round and yellow peas 2. 3 Round and green peas 3. 1 Wrinkled and yellow peas > >
You are handed a mystery pea plant with tall stems and axial flowers and asked to determine its genotype as quickly as possible. You know that the allele for tall stems (T) is dominant to that for dwarf stems (t) and that the allele for axial flowers (A) is dominant to that for terminal flowers (a). Identify all the possible genotypes for your mystery plant. Describe the one cross you would do in your garden to determine the exact genotype of your mystery plant. While waiting for the results of your cross, you predict the results for each possible genotype listed in part a. Explain how you do this and why this is not called “performing a cross.” Explain how the results of your cross and your predictions will help you learn the genotype of your mystery plant. Question is also in the picture.
In Bean plants two genes are defined below with the lower case letter indicating the recessive allele. yellow flower color a = green flower color. B = spotted pods b = plain pods A = A parental generation cross is made between a pure breeding plant with yellow flower color and spotted pods, to a pure breeding plant with green flower color and plain pods. Write this parental generation cross using the symbols defined above. Write the genotype of the F1 plants. An F1 plant is then testcrossed. Write this testcross using the symbols defined above.
The results of a test cross of a plant that is heterozygous for three traits encoded by the genes D, R, and Q are summarized in the table (below), which shows the numbers of offspring that inherited each combination of alleles from the heterozygous parent. Use the data collected to make a genetic map of genes D, R, and Q. Make a map of the distance between these three genes. Report your results by entering the genetic distance between each pair of genes to the nearest 0.1 cM in the blanks below. Distance D-Q: Distance D-R: Distance Q-R: Alleles from heterozygous parent R d d D D D D d r R r r R r R Number q 474 Q 289 q 286 q 30 Q 475 Q 155 159 32 q Q cM см cM
You have been tasked by a pharmaceutical company to generate a novel strain of Cannabis sativa for therapeutic purposes. Consider a Cannabis strain with three genes (called gene 1, gene 2 and gene 3) that are on different chromosomes and assort independently. Each gene has two alleles, described below: The T allele for gene 1 is dominant and associated with the trait of producing a large amounts of terpenes, and the t allele is recessive and associated with the trait of producing a low amount of terpenes The S allele for gene 2 is dominant and associated with the trait of fast growth, and the s allele is associated with the trait of slow growth The F allele for gene 3 is associated with the trait of producing large flowers, and the f allele is associated with the trait of producing small flowers Assume that an individual plant that is heterozygous for genes 1 and 2, but homozygous ff for gene 3 self-fertilizes. What is the probability of getting a plant that produces a large amount…