Crossing over of chromosomes during meiosis shuffles parental chromosomes, resulting in a genetically unique child. Select the three true statements about crossing over. Chromosomes from the egg and the sperm undergo crossing over immediately after fertilization occurs. During prophase I of meiosis 1, homologous paternal and maternal chromosomes line up at the metaphase plate. D Chiasmata in nonsister chromatids decrease the genetic variability produced during crossing over During meiosis II, sister chromatids separate into four different gametes. A hybrid chromosome that has crossed over will contain pieces of both the maternal and paternal chromosomes.

## Step 1<br />The first statement says, "Chromosomes from the egg and the sperm undergo crossing over immediately after fertilization occurs." This is not true. Crossing over happens during meiosis I, specifically in prophase I, before fertilization occurs.<br /><br />## Step 2<br />The second statement says, "During prophase I of meiosis 1, homologous paternal and maternal chromosomes line up at the metaphase plate." This is not true. Homologous chromosomes line up at the metaphase plate during metaphase I, not prophase I.<br /><br />## Step 3<br />The third statement says, "Chiasmata in nonsister chromatids decrease the genetic variability produced during crossing over." This is not true. Chiasmata in nonsister chromatids actually increase genetic variability by allowing the exchange of genetic material between homologous chromosomes.<br /><br />## Step 4<br />The fourth statement says, "During meiosis II, sister chromatids separate into four different gametes." This is true. Meiosis II is similar to mitosis, where sister chromatids separate, resulting in four genetically unique gametes.<br /><br />## Step 5<br />The fifth statement says, "A hybrid chromosome that has crossed over will contain pieces of both the maternal and paternal chromosomes." This is true. The process of crossing over results in the exchange of genetic material between homologous chromosomes, leading to hybrid chromosomes with pieces from both parents.