Meiosis

WHAT DOES MEIOSIS CREATE?

• CHROMOSOMES

• GAMETES

• DNA

• TRAITS

MEIOSIS IS NEEDED BECAUSE...

• IT ACTUALLY ISN'T, BUT CAN BE HELPFUL IN SOME ORGANISMS

• TO REDUCE THE CHROMOSOME NUMBER BY HALF

• SO THAT EVERY CELL IS EXACTLY IDENTICAL

• TO MAKE SURE EVERY HUMAN CELL HAS 92 CHROMOSOMES

THE END RESULT OF MEIOSIS IS...

• FOUR UNIDENTICAL GAMETES

• FOUR IDENTICAL GAMETES

• TWO IDENTICAL GAMETES

• TWO UNIDENTICAL GAMETES

THE GAMETES ARE CONSIDERED TO HAVE ONE HALF OF THE GENETIC INFO SO IT IS CALL

• DIPLOID (2N)

• DIPLOID (N)

• HAPLOID (2N)

• HAPLOID (N)

MALE GAMETE IS KNOWN AS

• EGG

• SPERM

A FEMALE GAMETE IS KNOWN AS

• EGG

• SPERM

HOW MANY CHROMOSOMES DO HUMAN GAMETES HAVE?

• 46

• 23

• 47

• 22

CROSSING OVER ALLOWS FOR WHAT TO HAPPEN?

• ALL CELLS TO STAY THE SAME

• GENETIC VARIATION

• REDUCTION OF CHROMOSOMES

• CHROMOSOME NUMBER TO INCREASE

WHEN THE SPERM FERTILIZES THE EGG WHAT IS FORMED

• ZYGOTE

• EMBRYO

• FETUS

• FERTILIZATION

FERTILZATION IS ...

• THE FUSION OF A HAPLOID EGG AND SPERM

• THE FUSION OF A DIPLOID EGG AND SPERM

• THE FUSION OF A HAPLOID EGG AND DIPLOID SPERM

• THE FUSION OF TWO EGGS