MINITEST TOMORROW MEIOSIS REVIEW ANSWERS

QUESTION # 1 Match the following. F Individual chromosomes line up at the equator A Homologous chromosomes pair up; crossing-over occurs G Centromere splits; sister chromatids move to opposite poles E Chromosomes condense; spindle fibers form D Cell divides forming 2 daughter cells B Homologous chromosome pairs line up at the equator C One chromosome from each pair moves to each pole H Cell divides forming 4 haploid daughter cells

QUESTION #2 What (specifically) is being made during meiosis? Gametes Sperm Eggs

QUESTION #3 How many times does the cell divide during meiosis? Two times

QUESTION #4 If an organism has 16 chromosomes in one of its body cells, how many chromosomes would its sex cells have? 8

QUESTION #5 What is crossing over? Draw an example to show crossing-over. When pieces of chromosomes cross over each other, resulting in a new combination of genes

QUESTION #6 When does crossing-over occur during Meiosis? Prophase I

QUESTION #7 Gametes are haploid/diploid.

QUESTION #8 What does haploid mean? One of each chromosome

QUESTION #9 What does diploid mean? Two of each chromosome

QUESTION #10 What is a tetrad and when does it form? A tetrad is four sister chromatids side- by-side It forms during prophase I

QUESTION #11 How many sperm are produced per parent cell during meiosis? Four

QUESTION #12 How many eggs are produced per parent cell during meiosis? One Why is this different from the number of sperm produced? The cells divide unevenly

QUESTION #13 Why does the chromosome number need to be cut in half during meiosis? So that when the sperm and egg combine, the zygote will have the correct number of chromosomes

QUESTION # 14 MitosisMeiosis Type of Cell Regular body cells Sex cells only # of divisions 12 # of daughter cells 24 diploid/haploid Diploid (identical to parent) Haploid (different from parent) purpose Growth & repair reproduction

QUESTION #15 Know the Comparing Mitosis and Meiosis worksheet information.