TABLE 1.
Expert responses to survey about importance of meiosis-related concepts
| Larger concept | Statement | Experts (N = 68) who considered the concept to be “core” or “very important” |
|---|---|---|
| Mechanism of homologous pairing | Physical linkage is essential for proper chromosome separation. | 75.0% |
| Crossing over requires sequence homology. | 77.9% | |
| DNA sequence homology determines pairing. | 77.9% | |
| Homology | Maternal and paternal chromosomes of the same kind are homologous. | 100.0% |
| X and Y chromosomes behave as a homologous pair. | 80.9% | |
| Homologous chromosomes are different than sister chromatids. | 98.5% | |
| Ploidy | Gametes are haploid. | 94.1% |
| Chromosomes rather than chromatids determine ploidy. | 80.9% | |
| A cell becomes haploid after meiosis I. | 94.1% | |
| Chromosomes may contain one or two chromatids, depending on whether or not DNA replication has taken place. | 92.6% |