/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 8 In a cross between a heterozygou... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 2: Problem 8

In a cross between a heterozygous tall pea plant and a dwarf plant, predict the ratios of the offspring's genotypes and phenotypes.

Short Answer

Expert verified
The genotypic ratio of offspring in a cross between a heterozygous tall pea plant and a dwarf pea plant is 1:1 (1 Tt : 1 tt). The phenotypic ratio is also 1:1, with half the offspring being tall (Tt) and half being dwarf (tt).

Step by step solution

01

Determine Genotypes of Parent Plants

The genotypes of the parent plants are first determined. A tall plant that is heterozygous would have a Tt genotype (where T represents the dominant tall allele and t represents the recessive dwarf allele). A dwarf plant would be homozygous recessive, hence tt.
02

Set Up the Punnett Square

A Punnett square is set up to predict the genotypes of the offspring. The Punnett square is a 2x2 grid, with one parent鈥檚 alleles on the top and the other parent鈥檚 on the side. T and t would be written on the top (representing the tall plant鈥檚 alleles) and t and t would be written on the side (representing the dwarf plant鈥檚 alleles).
03

Fill in the Punnett Square

Fill in the Punnett square by dragging each top allele down into the boxes below and each side allele across into the boxes to its right. This results in the creation of four boxes within the square, each representing a possible genotype for the offspring.
04

Determine Genotypic and Phenotypic Ratios

The genotypic ratio is determined by counting the proportion of each genotype among the outcomes in the Punnett square. The phenotypic ratio is determined based on these genotypes, keeping in mind that T is dominant to t. Thus, genotypes of Tt and TT will yield tall plants, and tt will yield dwarf plants.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

On rare occasions, an organism may have three copies of a chromosome and therefore has three copies of the genes on that chromosome (instead of the usual number of two copies). For such a rare organism, the alleles for each gene usually segregate so that a gamete will contain one or two copies of the gene. Let's suppose that a rare pea plant has three copies of the chromosome that carries the height gene. Its genotype is TTt. The plant is also heterozygous for the seed color gene, \(Y y\), which is found on a different chromosome. With regard to both genes, how many types of gametes can this plant make, and in what proportions? (Assume that it is equally likely that a gamete will contain one or two copies of the height gene.)

What is the difference between cross-fertilization and self-fertilization?

With regard to genotypes, what is a true-breeding organism?

Why did Mendel's work refute the idea of blending inheritance?

What are the expected phenotypic ratios from the following cross: Tt Rr yy Aa \(\times\) Tt rr \(Y Y A a\), where \(T=\) tall, \(t=\) dwarf, \(R=\) round, \(r=\) wrinkled, \(Y=\) yellow, \(y=\) green, \(A=\) axial, \(a=\operatorname{terminal} ; T, R\), \(Y\), and \(A\) are dominant alleles. Note: Consider using the multiplication method in answering this problem.
See all solutions

Recommended explanations on Biology Textbooks

Cell Communication

Read Explanation

Reproduction

Read Explanation

Communicable Diseases

Read Explanation

Astrobiological Science

Read Explanation

Bioenergetics

Read Explanation

Ecosystems

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.