Warm-up: Meiosis

Master meiosis concepts: gametes, mitosis vs. meiosis, chromosome numbers, diploid/haploid, and crossing over. Perfect for 9th-grade science review!

Directions: Carefully type in the correct term to fill in the missing information for each statement. Use the word bank below the statements. 1. Meiosis is a type of cell division that makes sex cells or gametes2. The female sex cells are called ovum or eggsand the male sex cell is sperm3. Mitosis consists of onecell division(s), while meiosis consists of twodivision(s).4. Mitosis results in daughter cells with the same number of chromosomes as the parent cell, but meiosis produces cells with halfthe number of chromosomes as the parent cell.5. A human's body cells have forty-sixchromosomes, and human sex cells, or gametes, have twenty-three 6. For every chromosome your mother gave you, there is a homologouschromosome from your father with information regarding the same trait(s)7. When a cell has a full complement of homologous chromosomes from each parent (twocomplete sets of chromosomes), the cell is said to be diploid8. Sex cells have only oneset of chromosomes, they are said to be haploid9. When an egg and a sperm combine during fertilizationthe zygotethat is formed has the normal diploid number of chromosomes10. Homologouschromosomes exchange information during meiosiswhich adds to diversity. This exchange of chromosome pieces is called crossing-over Meiosis vocabulary: use the following word bank terms to label each item in the image below. WORD BANK: chromosome, diploid, gametes, cytokinesis, centromere, homologous chromosomes, crossing over, sister chromatids, haploid centromere sister chromatids cytokinesis crossing over chromosome gametes diploid homologous chromosomes haploid