Biology / Unit 5 Bio 1053 short lesson, about 20 seconds
The Physical Basis of Segregation in Meiosis I
Captions available
The idea
The law of segregation's physical basis is anaphase I, where homologous chromosomes carrying an organism's two alleles separate to opposite poles.
In practice
A heterozygous cell's Y-bearing and y-bearing homologs separate at anaphase I — described only decades after Mendel's work.
Where people slip
Mendel deduced segregation from breeding ratios alone — the meiotic mechanism behind it was discovered after his death.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for Biology