The two homologs of a pair move toward opposite poles of dividing cell during (A) mitosis. (B) m

The two homologs of a pair move toward opposite poles of...

Key Concepts

Cell Division

Cell division encompasses the various processes by which a cell divides to form new cells. It includes different mechanisms such as mitosis, with identical daughter cell production, and meiosis, which generates gametes with genetic variation through distinct phases.

Meiosis I

This is the first division in the meiotic process during which homologous chromosomes pair up and then segregate towards opposite poles. This reductional division is crucial for halving the chromosome number in gametes, ensuring that fertilization restores the diploid state.

Homologous Chromosomes

These are pairs of chromosomes in a diploid cell, one inherited from each parent, that carry the same genes at the same loci. They are fundamental to sexual reproduction and genetic diversity because they undergo processes like pairing and recombination.

Transcript

00:01 This problem here is looking at what happens during a dividing cell in cell division.

00:09 We have two types of cell division.

00:12 We have mitosis, general cell growth, asexual reproduction, where one cell divides into two exact copies.

00:22 We have meiosis for things like sexual reproduction, where we have one cell divide into four gametes.

00:34 During each of these cell divisions, they go through different steps for the cells.

00:41 They chromosomes condense.

00:44 They line up in the middle.

00:47 They get pulled apart into two different cells that then pinch off.

00:56 And so with those different phases, the one in this problem, we can see it's talking about moving towards our different the opposite poles.

01:09 So we already know that's going to be anaphase.

01:12 So the phase they're referring to is anaphase.

01:15 But anapase does look different depending on if it's mitosis or meiosis and meiosis actually has two.

01:21 So we have meiosis one and myosis two.

01:24 It goes through two divisions.

01:26 So we're going to take a look at the questions referring to when two homologs of a pair of chromosome move towards opposite poles.

01:44 So now we're actually see when two homologues, which are just homologous chromosomes.

01:54 So we're talking about homologous chromosomes are chromosomes.

02:02 Homologous chromosomes because there are two chromosomes of each type.

02:17 So two chromosomes of each type.

02:24 So there are pairs of chromosomes in diploid cells.

02:33 So we'll start with mitosis in mitosis, and in this, it's already gone through replication of those chromosomes.

02:44 So there's two of each.

02:45 They line up at the plate.

02:49 So if we show our cell, they line up...

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