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Q. No.In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates:
| 1. | chromosomes failed to separate during meiosis |
| 2. | the two genes are linked and present on the same chromosome |
| 3. | both of the characters are controlled by more than one gene |
| 4. | the two genes are located on two different chromosomes |
Subtopic: Â Linkage |Â Recombination Gene Mapping |
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Level 1: 80%+
NEET - 2016
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Subtopic: Â Linkage |
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Level 1: 80%+
NEET - 2015
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When the two genes in a dihybrid cross were situated on the same chromosome:
| 1. | the proportion of parental gene combinations were much lower than the non-parental type. |
| 2. | the proportion of parental gene combinations were much higher than the non-parental type. |
| 3. | the proportion of parental gene combinations were equal to the non-parental type. |
| 4. | only the parental gene combinations were seen in the progeny. |
Subtopic: Â Linkage |
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Level 1: 80%+
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