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In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]
- a)the two genes are located on two different chromosomes.
- b)chromosomes failed to separate during meiosis.
- c)the two genes are linked and present on the same chromosome.
- d)both of the characters are controlled by more than one gene.
Correct answer is option 'C'. Can you explain this answer?
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In a testcross involving F1 dihybrid flies, more parental-type offspri...
(c) When two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations are much higher than the non-parental or recombinant type. This is also called incomplete linkage.
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In a testcross involving F1 dihybrid flies, more parental-type offspri...
Explanation:
- A dihybrid cross involves two genes located on different chromosomes or two genes located on the same chromosome but sufficiently far apart that they assort independently during meiosis.
- In a testcross, the F1 dihybrid individual is crossed with a homozygous recessive individual to determine the genotype of the F1 individual.
- If the two genes are unlinked and assort independently, the expected ratio of parental-type to recombinant-type offspring is 1:1.
- If the two genes are linked and present on the same chromosome, the expected ratio of parental-type to recombinant-type offspring is greater than 1:1, with more parental-type offspring produced due to the physical linkage of the two genes.
- Therefore, the production of more parental-type offspring than recombinant-type offspring in a testcross involving F1 dihybrid flies indicates that the two genes are linked and present on the same chromosome.
Answer: c) the two genes are linked and present on the same chromosome.
- A dihybrid cross involves two genes located on different chromosomes or two genes located on the same chromosome but sufficiently far apart that they assort independently during meiosis.
- In a testcross, the F1 dihybrid individual is crossed with a homozygous recessive individual to determine the genotype of the F1 individual.
- If the two genes are unlinked and assort independently, the expected ratio of parental-type to recombinant-type offspring is 1:1.
- If the two genes are linked and present on the same chromosome, the expected ratio of parental-type to recombinant-type offspring is greater than 1:1, with more parental-type offspring produced due to the physical linkage of the two genes.
- Therefore, the production of more parental-type offspring than recombinant-type offspring in a testcross involving F1 dihybrid flies indicates that the two genes are linked and present on the same chromosome.
Answer: c) the two genes are linked and present on the same chromosome.
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In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. Can you explain this answer?
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In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. 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 In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. Can you explain this answer?.
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. 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 In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates [2016]a)the two genes are located on two different chromosomes.b)chromosomes failed to separate during meiosis.c)the two genes are linked and present on the same chromosome.d)both of the characters are controlled by more than one gene.Correct answer is option 'C'. Can you explain this answer?.
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