Concept explainers
DRAW IT Two pea plants heterozygous for the characters of pod color and pod shape are crossed. Draw a Punnett square to determine the
To draw:
The Punnett square to determine the phenotypic ratios of the offspring.
Introduction:
Punnett square is a tabular representation of the cross between the two species. It helps in determining the outcome of a particular cross and can help in estimating the genotypic as well as the phenotypic ratio.
Explanation of Solution
Pictorial representation: Punnett square depicting the dihybrid cross between the two pea plants are as follows:
Parental traits: Pod Colour: Dominant yellow (Y); recessive green (y)
Pod Shape: Dominant round (R); recessive wrinkled (r)
Fig.: 1 Punnett square depicting the dihybrid cross between the two pea plants of different characters.
The Punnett square is the diagrammatic representation to predict the outcome (phenotype and genotype) of the breeding experiment. In the given cross, pea plants that have two distinct characters are chosen, where one has round and yellow pods and the other one has wrinkled and green pods.
The cross provides a phenotypic ratio of 9:3:3:1 in a total of 16 outcomes. This means that there will be 4 different types of outcomes, namely round and yellow, round and green, wrinkled and yellow, and wrinkled and green. The genotypic ratio of the cross is 1:2:1:2:4:2:1:2:1, which means that there are 9 different types of genotype in this dihybrid cross.
Want to see more full solutions like this?
Chapter 11 Solutions
Campbell Biology In Focus
Additional Science Textbook Solutions
Biology: Life on Earth with Physiology (11th Edition)
Genetics: From Genes to Genomes
Campbell Essential Biology (7th Edition)
- Selection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forward
- magine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forwardWhat are coupled transporters?arrow_forward
- How do histamine and prostaglandins help in the mobilization of leukocytes to an injury site? What are chemotactic factors? How do they affect inflammation process?arrow_forwardCompare and contrast neutrophils and macrophages. Describe two ways they are different and two ways they are similar.arrow_forwardDescribe the effects of three cytokines (not involved in the initial inflammation response). What cells release them?arrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
- Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning