1. MEIOSIS 11-4 Making gametes…
Making gametes…

2. MITOSIS
Produces cells that are __________ copies of parent cell

3. Remember from Chapter 1: CHARACTERISTICS OF LIVING THINGS ALL LIVING THINGS __________
Planaria animation: Family

4. SEXUAL REPRODUCTION
Family image from:
Combines genetic material from 2 parents (sperm & egg) so offspring are
genetically ____________ from parents

5. + EGG SPERM  If egg and sperm had same number of
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!

6. MEIOSIS is the way… to make cells with ½ the number of chromosomes
for sexual
reproduction

8. MAKING SPERM & EGGS

9. ___________________= MAKING MATURE SPERM
Mature & grow flagella

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

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

12. 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!

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

14. SOUTH DAKOTA CORE SCIENCE STANDARDS
LIFE SCIENCE: Indicator 1: Understand the fundamental structures,
functions, classifications, and mechanisms found
in living things
9-12.L 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

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

16. 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;

17. 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.