IIT JAM Exam > IIT JAM Questions > Inbred lines of two mutant plants, both beari...
Start Learning for Free
Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?
- a)Flower colour is controlled by only one gene.
- b)Two gene loci controlled the flower colour.
- c)The mutations in the parents do not complement each other.
- d)Flower colour is polygenic and follows quantitative inheritance.
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Inbred lines of two mutant plants, both bearing white flowers, were cr...
A dihybrid cross with two gene loci. Mutations are complement to one another
Most Upvoted Answer
Inbred lines of two mutant plants, both bearing white flowers, were cr...
Understanding the Flower Colour Inheritance
The observation of flower colour inheritance in the mutant plants can be explained by the genetic interactions between two loci. The key points of the scenario are:
- Mutant Parents with White Flowers: Both parents are inbred lines with mutations leading to white flowers. This indicates that each parent may have a mutation in a different gene that affects flower colour.
- F1 Generation with Red Flowers: The F1 generation exhibits red flowers, suggesting that the red phenotype is dominant over the white. This dominance indicates the presence of functional alleles that can produce red flowers when at least one is present.
- Phenotypic Ratio of 9:7 in F2 Generation: Selfing the F1 plants yields a phenotypic ratio of 9 red to 7 white flowers. This ratio suggests the involvement of two unlinked genes, each contributing to the flower colour.
Conclusion: Two Gene Loci Controlled the Flower Colour
- Complementation Test: The 9:7 ratio implies that when both genes are functional, the flowers are red, but if any gene is mutated (homozygous recessive), the flowers will be white. This indicates that the mutations in the parents do not complement each other.
- Two Genes in Action: The presence of two different loci controlling the trait leads to a variety of combinations in the F2 generation, highlighting the interaction between these genes.
Final Note
Thus, the correct conclusion is that two gene loci controlled the flower colour, aligning with the observed phenotypic ratio in the progeny. This genetic interaction underscores the complexity of inheritance beyond a single gene influence.
The observation of flower colour inheritance in the mutant plants can be explained by the genetic interactions between two loci. The key points of the scenario are:
- Mutant Parents with White Flowers: Both parents are inbred lines with mutations leading to white flowers. This indicates that each parent may have a mutation in a different gene that affects flower colour.
- F1 Generation with Red Flowers: The F1 generation exhibits red flowers, suggesting that the red phenotype is dominant over the white. This dominance indicates the presence of functional alleles that can produce red flowers when at least one is present.
- Phenotypic Ratio of 9:7 in F2 Generation: Selfing the F1 plants yields a phenotypic ratio of 9 red to 7 white flowers. This ratio suggests the involvement of two unlinked genes, each contributing to the flower colour.
Conclusion: Two Gene Loci Controlled the Flower Colour
- Complementation Test: The 9:7 ratio implies that when both genes are functional, the flowers are red, but if any gene is mutated (homozygous recessive), the flowers will be white. This indicates that the mutations in the parents do not complement each other.
- Two Genes in Action: The presence of two different loci controlling the trait leads to a variety of combinations in the F2 generation, highlighting the interaction between these genes.
Final Note
Thus, the correct conclusion is that two gene loci controlled the flower colour, aligning with the observed phenotypic ratio in the progeny. This genetic interaction underscores the complexity of inheritance beyond a single gene influence.
|
Explore Courses for IIT JAM exam
|
|
Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer?
Question Description
Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer?.
Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for IIT JAM.
Download more important topics, notes, lectures and mock test series for IIT JAM Exam by signing up for free.
Here you can find the meaning of Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Inbred lines of two mutant plants, both bearing white flowers, were crossed. The F1 plants were all red coloured flowers. Selfing the F1 plants, produced progeny with phenotypes of red and white coloured flowers in 9: 7 ratio. Based on this information, which one of the following conclusions is correct?a)Flower colour is controlled by only one gene.b)Two gene loci controlled the flower colour.c)The mutations in the parents do not complement each other.d)Flower colour is polygenic and follows quantitative inheritance.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice IIT JAM tests.
|
|
Explore Courses for IIT JAM exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup