Linkage deecrease the frequency of

Options

A. Recessive allele
B. Dominant
C. Hybrid
D. Both B and C

Answer

### Step-by-Step Solution:

1. **Understanding Linkage**: Linkage refers to the phenomenon where genes that are located close to each other on the same chromosome tend to be inherited together. This is because they are physically linked and are less likely to be separated during meiosis.

2. **Definition of Linked Genes**: Genes that are located close to each other on a chromosome are termed as linked genes. These genes have a higher probability of being inherited together compared to genes that are far apart on the chromosome.

3. **Genetic Linkage**: When linked genes are inherited together, this phenomenon is referred to as genetic linkage. The closer the genes are on the chromosome, the stronger the linkage and the lower the chance of recombination occurring between them.

4. **Recombination Frequency**: Recombination frequency is the measure of how often recombination occurs between two genes during meiosis. If genes are linked, the recombination frequency will be low because they are less likely to be separated. Conversely, if genes are unlinked, the recombination frequency will be higher.

5. **Effect of Linkage on Hybrid Frequency**: Since linked genes are inherited together, the presence of linkage decreases the frequency of hybrid offspring. A hybrid offspring results from the combination of different alleles, which is less likely to occur when genes are closely linked.

6. **Conclusion**: Therefore, the answer to the question "Linkage decreases the frequency of..." is that linkage decreases the frequency of hybrids.

### Final Answer:
Linkage decreases the frequency of hybrids.

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