Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
FlyMeiosis17.notebook February 28, 2017 QOD2/23/17 1. How much genetic information is each parent responsible for? 2. Is the genetic information the same for males and females? 3. Will offspring always look like their parents? Learning Target(LT): I can describe and model the process of meiosis in which egg and sperm cells are formed.(State standard 911 LS1I) May 2610:47 AM . Put title of activity in TOC Fly Meiosis Activity Qs: How are gametes (sex cells) formed? How does sexual reproduction lead to genetic variation? Sep 21:50 PM 1 FlyMeiosis17.notebook February 28, 2017 Do Now2/24/17 1. If an organism has 36 chromosomes, how many chromosomes will be in each of its gametes (sex cells)? 2. What stage of cell division do you think this cell is in? Learning Target(LT): I can describe and model the process of meiosis in which egg and sperm cells are formed.(State standard 911 LS1I) May 2610:47 AM Do Now2/27/17 1. What is the difference between haploid and diploid cells? 2. What stage of cell division do you think this cell is in? Learning Target(LT): I can describe and model the process of meiosis in which egg and sperm cells are formed.(State standard 911 LS1I) May 2610:47 AM 2 FlyMeiosis17.notebook February 28, 2017 Evidence Collection: Prework: Comparing Mitosis to Meiosis reading and questions (~25 minutes, if you don't finish, complete as HW) As a class: 1. Watch short video on meiosis: add to reading At lab station: 26. Follow instructions in your handout: using the directions on the sticky notes Put descriptions on the SIDE of circles, draw chromosomes IN the circles 7. Draw chromosomes on notes page add alleles (letters) r R to notes. 812. Make fly offspring (you do this 4x at least 1 per person) complete Analysis 13. Answer Analysis questionson back. May 108:17 AM Offspring #1: EXAMPLE From you From another group Alleles: p G r x p g R Determined by dice roll Genotype after mating: p p G g R r Phenotype: what fly looks like rounded wings, white wings, red eyes To save time, only make ONE fly card per personā roll dice to determine which offspring you will do. Feb 279:21 AM 3 FlyMeiosis17.notebook February 28, 2017 Do Now2/28/17 1. Using your activity key, what would be the genotype and phenotype for the following cross pgr x PgR 2. What stage of cell division do you think this cell is in? Learning Target(LT): I can describe how gametes are formed and how meiosis leads to increased genetic variation. May 2610:47 AM Do Now2/28/17 1. Using your activity key, what would be the genotype and phenotype for the following cross pgr x PgR PpggRr pointed, spotted wings and red eyes 2. What stage of cell division do you think this cell is in? Telophase Learning Target(LT): I can describe how gametes are formed and how meiosis leads to increased genetic variation. May 2610:47 AM 4 FlyMeiosis17.notebook February 28, 2017 Red pen revision/addition(only write what you need!) Each human has 46 chromosomes, 23 from the female, 23 from the male. The corresponding chromosomes are said to be homologous. (22 autosomes, 1 sex chromosome) You are modeling only 3 pairs. Look at Vocabulary: Diploid (2N) a cell that contains both sets of homologous chromosomes (all the genetic info) Gametes (sex cells) have only one set of chromosomes (half the genetic info,) considered haploid (N) Haploid gametes are produced in meiosis: look at your diagram from activity and add notations/descriptions if needed. Jun 12:58 PM What has to happen before meiosis I? Double copies of chromosomes are made (2 homologous pairs) in the S phase of interphase Then we go to Meiosis I Prophase I same processes as mitosis Haploid or diploid? Crossing over occurs, produces new gene combinations (p. 504) does not happen in mitosis! Metaphase I Jun 13:14 PM 5 FlyMeiosis17.notebook February 28, 2017 Anaphase I Telophase I (not on diagram) Haploid or diploid? Cell divides, each new cell has 1 homologous pair, from either mom or dad (technically N) Jun 13:16 PM Meiosis II Cells undergo another division cycle Metaphase II Anaphase II Telophase II (not on diagram) Haploid or diploid? Jun 13:24 PM 6 FlyMeiosis17.notebook February 28, 2017 Each new cell has a single copy of the haploid (N) number of chromosomes Gametes: In males, all haploid gametes become sperm cells Notice how each gamete is unique! In females, only one haploid gamete will become an egg, the meiosis web link rest are called polar bodies Glue/tape diagram in notebook. Turn in packet and fly after analysis is complete. Still have questions about Meiosis? Go to the LINKS page on my SWIFT site under Bio:Heredity & Inheritance Jun 13:26 PM 7