| Our ability to detect doubly recombinant chromosomes depends on the genotype of the homolog after fertilization. |
| At the micropylar end where the pollen tube delivers the two sperm cells, the egg cell is flanked by two synergids that assist in fertilization. |
| The ostium leads to the second portion of the oviduct, the ampulla, which is the duct's dilated mid-portion where fertilization usually occurs. |
| Such a mutant megagamete could participate in fertilization with wild type pollens and sometimes set aberrant seeds with twin embryos. |
| The onset of hyperactive movement occurs near the site of fertilization and is crucial for penetrating the egg's zona pellucida. |
| Since in vitro fertilization started, two decades ago, there has been an explosion of twins, triplets, quadruplets, even quintuplets. |
