MEIOSIS 11-4 Making gametes… http://waynesword.palomar.edu/lmexer2a.htm Making gametes…

MITOSIS Produces cells that are __________ copies of parent cell

Remember from Chapter 1: CHARACTERISTICS OF LIVING THINGS ALL LIVING THINGS __________ Planaria animation: http://www.t3.rim.or.jp/~hylas/planaria/title.htm Family http://babyhearing.org/Parenet2Parent/index.asp

SEXUAL REPRODUCTION Family image from: http://babyhearing.org/Parenet2Parent/index.asp Combines genetic material from 2 parents (sperm & egg) so offspring are genetically ____________ from parents http://naturalsciences.sdsu.edu/classes/lab8/spindex.html

+ EGG SPERM  If egg and sperm had same number of http://www.angelbabygifts.com/ Image by Riedell Image by Riedell EGG + SPERM  If egg and sperm had same number of chromosomes as other body cells . . . baby would have too many chromosomes! http://www.acmecompany.com/stock_thumbnails/13217.forty-six_chromosomes.jpg

MEIOSIS is the way… to make cells with ½ the number of chromosomes for sexual reproduction http://waynesword.palomar.edu/lmexer2a.htm

http://www.tokyo-med.ac.jp/genet/anm/mimov.gi

MAKING SPERM & EGGS

___________________= MAKING MATURE SPERM Mature & grow flagella

Sperm provides DNA All the starting nutrients, organelles, molecule building blocks, etc. have to come from the egg.

__________________ = MAKING a MATURE EGG Produces: 1 “good” egg 3___________ CYTOPLASM DIVIDES UNEVENLY

Sperm donates mostly DNA WHY MAKE ONLY ONE “GOOD” EGG? Sperm donates mostly DNA Most of the cell parts and nutrients needed for baby come from EGG! http://bestweekever.blogs.com/photos/uncategorized/imagemain_sperm_egg1_1.gif

POLAR BODIES DEGENERATE (DIE) “Self digest” Using ________________ = __________________ “cell suicide” for good of organism

SOUTH DAKOTA CORE SCIENCE STANDARDS LIFE SCIENCE: Indicator 1: Understand the fundamental structures, functions, classifications, and mechanisms found in living things 9-12.L.1.1. Students are able to relate cellular functions and processes to specialized structures within cells. Cell life cycles Examples: somatic cells (mitosis), germ cells (meiosis) Storage and transfer of genetic information

SOUTH DAKOTA CORE SCIENCE STANDARDS LIFE SCIENCE: Indicator 2: Analyze various patterns and products of natural and induced biological change. 9-12.L.2.2. Students are able to describe how genetic recombination, mutations, and natural selection lead to adaptations, evolution, extinction, or the emergence of new species.

Core High School Life Science Performance Descriptors High school students performing at the ADVANCED level: predict the function of a given structure; predict the outcome of changes in the cell cycle; INTRODUCTION TO BE ABLE TO DO LATER predict how traits are transmitted from parents to offspring PROFICIENT level: describe the relationship between structure and function compare and contrast the cell cycles in somatic and germ cells; explain how traits are transmitted from parents to offspring; BASIC level recognize that different structures perform different functions describe the life cycle of somatic cells; identify that genetic traits can be transmitted from parents to offspring;

SOUTH DAKOTA ADVANCED SCIENCE STANDARDS LIFE SCIENCE: Indicator 2: Analyze various patterns and products of natural and induced biological change. 9-12.L.2.1A. Students are able to predict the results of complex inheritance patterns involving multiple alleles and genes. (SYNTHESIS) Examples: human skin color, polygenic inheritance relate crossing over to genetic variation.