Polyploid wheat does NOT normally show an increase in

Options

A. size
B. vigou
C. resistance to disease
D. length of life cycle.

Answer

To answer the question "Polyploid wheat does NOT normally show an increase in," we need to analyze the characteristics of polyploid wheat, particularly hexaploid wheat.

### Step-by-Step Solution:

1. **Understanding Polyploidy**:
- Polyploidy refers to the condition of having more than two complete sets of chromosomes. In the case of wheat, hexaploid wheat has six sets of chromosomes (6n = 42).

2. **Comparing Chromosome Numbers**:
- The wild type wheat has a diploid chromosome number (2n = 14). Hexaploid wheat, being polyploid, has a higher chromosome number.

3. **Characteristics of Hexaploid Wheat**:
- Polyploid wheat often exhibits certain advantages such as increased size of the plant and grain, improved disease resistance, and sometimes a longer life cycle.

4. **Identifying the Exception**:
- While polyploid wheat shows increases in size, grain size, and disease resistance, there are certain traits that do not typically increase with polyploidy.

5. **Conclusion**:
- The most relevant characteristic that polyploid wheat does NOT normally show an increase in is the length of the life cycle. Polyploidy can lead to larger plants and grains but does not necessarily extend the duration of their life cycle.

### Final Answer:
Polyploid wheat does NOT normally show an increase in the length of the life cycle.

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