Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 12, Problem 6A
Mendel’s model assumes that each trait is determined by a single factor with alternate forms. We now know that this is too simplistic and that
a. a single gene may affect more than one trait.
b. a single trait may be affected by more than one gene.
c. a single gene always affects only one trait, but traits may be affected by more than one gene.
d. a single gene can affect more than one trait, and traits may be affected by more than one gene.
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Students have asked these similar questions
If Mendel chose to study inheritance of height in human, would he have likely discovered the same princeple of heredity that he discovered in working with pea plants?
A. Yes, because human height is a continuously varying trait, just like the traits Mendel studied in pea plants.
B. No, because the generation time in humans is relatively long compared with pea plants.
C. Yes, because the principles of segregation and independent assortment also apply to human genes.
D. No, because human height is not genetically determined.
Mendel, the father of genetics, was a careful researcher who studied the inheritance of certain traits in garden peas. Which of the following was NOT part of Mendel's
research strategies?
A.) He crossed true-breeding (self pollinating) pea plants.
B.) He allowed eggs to be fertilized ONLY by self pollination.
C.) He analyzed his data mathematically.
B.) He controlled variables by studying 1 or 2 traits at a time.
Which of the following is evidence that Mendel had that helped him to construct his Law of Segregation?A) His F2 generation in the dihybrid cross resulted in a 1:1:1:1 distribution of phenotypes.B) He found no linkage of different genes in the offspring of his pea plants.C) The F1 generation of the monohybrid cross resulted in blended phenotypes.D) The F2 generation of the monohybrid cross resulted in the recessive trait reappearing as a phhenotype.E) Two of the above are correct.
Chapter 12 Solutions
Biology
Ch. 12 - What property distinguished Mendels investigation...Ch. 12 - The F1 generation of the monohybrid cross purple...Ch. 12 - The F1 plants from the previous question are...Ch. 12 - In a cross of Aa Bb cc X Aa Bb Cc, what is the...Ch. 12 - An organisms __________ is/are determined by its...Ch. 12 - Phenotypes like height in humans, which show a...Ch. 12 - Japanese four oclocks that are red and tall are...Ch. 12 - If the two genes in the previous question showed...Ch. 12 - What is the probability of obtaining an individual...Ch. 12 - Prob. 4A
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Gregor Mendel proposed the law of independent assortment based on the observation that dihybrid crosses of heterozygous individuals produced progeny in a 9:3:3:1 ratio. For this observation to hold, which assumption must be true? A. The traits are governed by genes on different chromosomes. B. The traits are governed by genes on the same chromosome. C. The traits are governed by genes with only two alleles. D. The traits are governed by genes with only three alleles.arrow_forwardImagine that Mendel is tending a garden of 100 pea plants. He has 20 plants that are homozygous for the purple allele, 50 plants that are heterozygous, and 30 plants that are homozygous for the white allele. A) What is the frequency of the purple (P) allele? B) What is the frequency of the white (p) allele?arrow_forwardGregor Mendel noticed that recessive characteristics are "masked" in the F1 generation but reappear in the F2 generation. Which of the following laws best explains this observation? a. The law of products b. The law of segregation c. The law of independent assortment d. The law of linked alleles e. None of the abovearrow_forward
- which one of Mendel‘s laws states that alleles for each trait are passed on independent of alleles for any other trait? A. law of dominance B. law of segregation C. law of independent assortment D. Mendel did not have any lawsarrow_forwardWhich of the following is false? a. the pollen grain shape was studied by Mendel. b. Mendel believed that the characteristics of pea plants were determined by the inheritance units or factors from both parents. c. An allele is one of several possible forms of a gene. d. When the genotype consists of a dominant and recessive allele, the phenotype will be like the dominant allele.arrow_forwardWhile traits Mendel worked with all adhered to his principles of inheritance, this is not the norm because phenotypes are typically a combination of both genetic and what other kind of influence? A. nature B. nurture C. environmental D. both nurture and environmentalarrow_forward
- Why did Mendel’s work refute the idea of blending inheritance?arrow_forwardAll of the following are reasons that Mendel chose the pea plant as a model system for his studies EXCEPT ________. A) peas have a relatively short generation time B) peas produce large numbers of seeds C) he could control which parents were involved in mating D) peas only reproduce by cross-fertilizationarrow_forwardHow was Mendel's Law of Independent Assortment demonstrated by the dihybrid cross he performed with peas?A) The yellow peas always occurred with the round trait in the F2 generation.B) All four phenotype combinations occurred in the F2 generation.C) Yellow was dominant over green, and round was dominant over wrinkled peas.D) Two distinct phenotypes were seen in the F2 generation.E) Mendel's Law of Independent Assortment was not demonstrated by his dihybrid cross, but was demonstrated by his monohybrid cross.arrow_forward
- Which of the following statements is false?a. Mendelian inheritance patterns obey the law of segregation.b. Mendelian inheritance patterns obey the law of independentassortment.c. All inheritance patterns show a simple dominant/recessiverelationship.d. None of the above is falsearrow_forwardA cross between a horse homozygous for red hair and a horse homozygous for white hair results in offspring with the coat colour called roan. When you look at the fur of the roan offspring you see both red and white hairs. What type of inheritance best explains this? a) blending inheritance b)codominance c)incomplete codominance d)multiple allelesarrow_forwardWhen Mendel was conducting his research, he crossed two different varieties of pea plants, one that had jagged leaves with 8 points on each leaf and one that had perfectly smooth leaves. He found that the offspring all had 4 to 5 points on each leaf. Based on what you have learned in this course, how would you explain this result to Mendel?arrow_forward
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How to solve genetics probability problems; Author: Shomu's Biology;https://www.youtube.com/watch?v=R0yjfb1ooUs;License: Standard YouTube License, CC-BY
Beyond Mendelian Genetics: Complex Patterns of Inheritance; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-EmvmBuK-B8;License: Standard YouTube License, CC-BY