Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 12, Problem 21RQ
Which of the following situations does not follow the Law of Independent Assortment?
- A blond man and a brunette woman produce three offspring over time, all of who have blond hair
- A white cow crossed with a brown bull produces roan cattle
- Mating a hog with a sow produces six female piglets
- Men are more likely to experience hemophilia than women.
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Which of the following terms is used to describe the offspring of a cross of two true-breeding parents that differ in one or more traits?
Pure line
Homozygous
Reciprocal
Hybrid
Use the following parents to create a Punnet Square and answer the question. Cross a heterozygous father with a homozygous recessive mother. (you can use the letter A for your parental genotypes)
What percent of the offspring will be homozygous recessive?
Which of the following is a conclusion in Mendel' independent assortment law?
options:
Genes controlling different traits segregate independently of each.
Gametes from each plant have two copies of the gene for each trait.
An organism's homologous chromosomes segregate from each other during gamete formation.
The two genes for a trait carried by an organism may be identical to one another
Chapter 12 Solutions
Biology 2e
Ch. 12 - Figure 12.5 In pea plants, round peas (R) are...Ch. 12 - Figure 12.6 What are the genotypes of the...Ch. 12 - Figure 12.12 What ratio of offspring would result...Ch. 12 - Figure 12.16 In pea plants, purple flowers (P) are...Ch. 12 - Mendel performed hybridizations by transferring...Ch. 12 - Which is one of the seven characteristics that...Ch. 12 - Imagine you are performing a cross involving seed...Ch. 12 - Consider a cross to investigate the pea pod...Ch. 12 - A scientist pollinates a true-breeding pea plant...Ch. 12 - The observable traits expressed by an organism are...
Ch. 12 - A recessive trait will be observed in individuals...Ch. 12 - If black and white true-breeding mice are mated...Ch. 12 - The ABO blood groups in humans are expressed as...Ch. 12 - In a mating between two individuals that are...Ch. 12 - If the allele encoding polydactyly (six fingers)...Ch. 12 - A farmer raises black and white chickens. To his...Ch. 12 - Assuming no gene linkage, in a dihybrid cross of...Ch. 12 - The forked line and probability methods make use...Ch. 12 - How many different offspring genotypes are...Ch. 12 - Labrador retriever's fur color is controlled by...Ch. 12 - Which of the following situations does not follow...Ch. 12 - Describe one of the reasons why the garden pea was...Ch. 12 - How would you perform a reciprocal cross for the...Ch. 12 - Mendel performs a cross using a true-breeding pea...Ch. 12 - Calculate the probability of selecting a heart or...Ch. 12 - The gene for flower position in pea plants exists...Ch. 12 - Use a Punnett square to predict the offspring in a...Ch. 12 - Can a human male be a carrier of red-green color...Ch. 12 - Why is it more efficient to perform a test cross...Ch. 12 - Use the probability method to calculate the...Ch. 12 - Explain epistatis in terms of its Greek-language...Ch. 12 - In Section 12.3, ''Laws of Inheritance," an...Ch. 12 - People with trisomy 21 develop Down’s syndrome....Ch. 12 - A heterozygous pea plant produces violet flowers...
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- One gene has alleles A and a. Another has alleles B and b. For each genotype listed, what type(s) of gametes can be produced? (Assume independent assortment occurs.) a. AABB b. AaBB c. Aabb d. AaBbarrow_forwardIndependent assortment means _______. a. alleles at one locus assort into different gametes b. alleles at different loci tend to assort into gametes independently of each otherarrow_forwardWhich of the following would conform to Mendel’s law of independent assortment?a. all the alleles of different genesb. alleles located on different chromosomesc. alleles located on sex chromosomesd. alleles located on the same chromosomearrow_forward
- Use the following parents to create a Punnet Square and answer the question. Cross a homozygous dominant father with a homozygous recessive mother. (you can use the letter A for your parental genotypes) What percent of the offspring will be homozygous recessive?arrow_forwardBelow is a pedigree of a rare human genetic disease in which stricken individuals are solid-colored. After you decide what kind of inheritance this is (note the grandparents), apply the laws of probability and calculate the probability the offspring of the cousin marriages a) 2 × 3 will have the disease. 1/2 1/4 1/8 1/16 2/3arrow_forwardThe cross AaBb x aaBB results in which of the following phenotypic ratios? 1:1 1:1:1:1 1:2:1 9:3:3:1arrow_forward
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- Which of the following statements correctly describes the Law of Independent Assortment? a. A large Punnett square can be used to predict the outcome of a parental cross involving two traits. b. Non-allelic genes do not affect each other if they are located on separate chromosomes. c. Sometimes all alleles lack dominance, which leads to a blending of traits. d. The dominant allele is represented with an uppercase letter and the recessive allele is represented with a lowercase letter.arrow_forwardThe chestnut coat color of horses is due to a recessive gene, while the dominant allele results in black. The pacing gait is due to a recessive gene, whereas the dominant allele results in the trotting gait. Show the types of offspring that could result from a cross of a black trotter (male), heterozygous for both genes, with a chestnut pacer (female).arrow_forwardA man is homozygous dominant for fair skin and heterozygous for black-straight hair, his wife has brown skin and black-curly hair. The wife's hair color is the same genotypically with the husband. His mother in-law hair color is red since birth. The couple wanted to have kids. What is the probability that their child will be a girl?arrow_forward
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