![]() ![]() Homologous chromosomes can exchange parts in a process called "crossing over. So, after meiosis I, interphase takes place and S phase during which centrosome is duplicated. The same way it duplicates in the mitosis - during interphase. They’re just floating around in the form of loosely collected chromatin. During interphase, the parent cell’s chromosomes are replicated, but they aren’t yet visible. In Metaphase I, homologous chromosome pairs line up. Interphase takes place between two meiotic divisions. This is when the genetic fibers within the cell’s nucleus, known as chromatin, begin to condense and become tightly compacted together. This shuffling process is known as recombination or "crossing over" and occurs while the chromome pairs are lined up in Metaphase I. Parent cells just before prophase 1 is diploid (2n). Each sibling is 50% mom and 50% dad, but which 50% of each can vary in the siblings. Transcribed image text: Can you compare the daughter cells formed at the end of meiosis II to the. But this happens independently for each trait, so just because you got your dad's brown eyes doesn't mean you'll get his blond hair too. Each sperm and egg will end up with either B or b from mom and either B or b from dad. This leads to four possibilities: You could get B from mom and B from dad, or B from mom and b from dad, or b from mom and B from dad, or b from mom and b from dad. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. Do cells always grow before they divide S phase. Imagine, for example, that eye color was controlled by a single gene, and that mom could have B, the allele for brown eyes or b, the allele for blue eyes, and dad could also have B or b. 1 1 phase, also called the first gap phase, the cell grows physically larger, copies organelles, and makes the molecular building blocks it will need in later steps. But each non-identical-twin child of these parents ends up with a different combination. ![]() You ended up with half of mom's paired genes and half of dad's paired genes. Your parents each have at least one pair of alleles (versions of a gene) for every trait (and many pairs of alleles for each polygenic trait). ![]()
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