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Read the given paragraph to answer
In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.
In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.
Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?
- a)9:3:3:1 ratio of phenotypes only
- b)9:3:3:1 ratio of genotypes only
- c)1:1:1:1 ratio of phenotypes only
- d)1:1:1:1 ratio of phenotypes and genotypes
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Read the given paragraph to answerIn a certain plant, yellow fruit col...
When YyRr is crossed with double recessive parent then genotypic and phenotypic ratio will be 1:1:1:1
Phenotypic ratio = 1 yellow round : 1 yellow oval : 1 green round : 1 green and oval. This represent a test cross.
Most Upvoted Answer
Read the given paragraph to answerIn a certain plant, yellow fruit col...
Explanation:
To understand the correct answer, let's first analyze the genotypes of the parents and the possible combinations in the offspring:
- Parent 1: YyRr (yellow fruit color, round shape)
- Parent 2: yyrr (green fruit color, oval shape)
Possible gametes:
- Parent 1: YR, Yr, yR, yr
- Parent 2: yr, yr
F1 generation:
When the parents are crossed, the possible combinations of gametes are:
- YR yr
- Yr yr
- yR yr
- yr yr
The resulting offspring will have the following genotypes:
- YyRr (yellow fruit color, round shape)
- Yyrr (yellow fruit color, oval shape)
- yyRr (green fruit color, round shape)
- yyrr (green fruit color, oval shape)
Predicted phenotypes:
- Yellow, round fruit: YyRr, Yyrr, yyRr (3)
- Yellow, oval fruit: Yyrr (1)
- Green, round fruit: yyRr (1)
- Green, oval fruit: yyrr (1)
Explanation of the options:
a) 9:3:3:1 ratio of phenotypes only: This ratio suggests that there should be nine plants with yellow, round fruit, three plants with yellow, oval fruit, three plants with green, round fruit, and one plant with green, oval fruit. However, this does not match the possible phenotypes we determined earlier.
b) 9:3:3:1 ratio of genotypes only: This ratio suggests that there should be nine plants with the genotype YyRr, three plants with the genotype Yyrr, three plants with the genotype yyRr, and one plant with the genotype yyrr. Again, this does not match the possible genotypes we determined earlier.
c) 1:1:1:1 ratio of phenotypes only: This ratio suggests that there should be an equal number of plants with each phenotype. However, this does not match the possible phenotypes we determined earlier.
d) 1:1:1:1 ratio of phenotypes and genotypes: This ratio suggests that there should be an equal number of plants with each phenotype and genotype. This matches the possible phenotypes and genotypes we determined earlier. Therefore, option D is the correct answer.
To understand the correct answer, let's first analyze the genotypes of the parents and the possible combinations in the offspring:
- Parent 1: YyRr (yellow fruit color, round shape)
- Parent 2: yyrr (green fruit color, oval shape)
Possible gametes:
- Parent 1: YR, Yr, yR, yr
- Parent 2: yr, yr
F1 generation:
When the parents are crossed, the possible combinations of gametes are:
- YR yr
- Yr yr
- yR yr
- yr yr
The resulting offspring will have the following genotypes:
- YyRr (yellow fruit color, round shape)
- Yyrr (yellow fruit color, oval shape)
- yyRr (green fruit color, round shape)
- yyrr (green fruit color, oval shape)
Predicted phenotypes:
- Yellow, round fruit: YyRr, Yyrr, yyRr (3)
- Yellow, oval fruit: Yyrr (1)
- Green, round fruit: yyRr (1)
- Green, oval fruit: yyrr (1)
Explanation of the options:
a) 9:3:3:1 ratio of phenotypes only: This ratio suggests that there should be nine plants with yellow, round fruit, three plants with yellow, oval fruit, three plants with green, round fruit, and one plant with green, oval fruit. However, this does not match the possible phenotypes we determined earlier.
b) 9:3:3:1 ratio of genotypes only: This ratio suggests that there should be nine plants with the genotype YyRr, three plants with the genotype Yyrr, three plants with the genotype yyRr, and one plant with the genotype yyrr. Again, this does not match the possible genotypes we determined earlier.
c) 1:1:1:1 ratio of phenotypes only: This ratio suggests that there should be an equal number of plants with each phenotype. However, this does not match the possible phenotypes we determined earlier.
d) 1:1:1:1 ratio of phenotypes and genotypes: This ratio suggests that there should be an equal number of plants with each phenotype and genotype. This matches the possible phenotypes and genotypes we determined earlier. Therefore, option D is the correct answer.
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Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer?
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Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer?.
Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice Read the given paragraph to answerIn a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?a)9:3:3:1 ratio of phenotypes onlyb)9:3:3:1 ratio of genotypes onlyc)1:1:1:1 ratio of phenotypes onlyd)1:1:1:1 ratio of phenotypes and genotypesCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice NEET tests.
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