Meiosis and Chromosome Number

The idea of non-disjunction of the 21st chromosome means the following:

• complete seperation of chromosomes

• complete seperation of genes

• failure for chromosomes to seperate

• failure for genes to seperate

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)

THE STRUCTURE THAT CONTAINS THE DNA IS CALLED (CHOOSE THE MOST SPECIFIC ANSWER)

• CHROMOSOME

• CELL BODY

• CELL

• NUCLEUS

Tags

NGSS.HS-LS3-1

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

Tags

NGSS.HS-LS3-2

WHY ARE THE CHROMOSOMES EVEN NUMBERED FOR ORGANISIMS?

• JUST A COINCIDENCE

• BECAUSE 75% OF THE INFO COMES FROM MOM AND 25% COMES FROM DAD

• BECAUSE 51% OF THE INFO COMES FROM MOM AND 49% COMES FROM DAD

• BECAUSE HALF OF THE GENTIC INFORMATION COMES FROM MOM AND HALF COMES FROM DAD

Tags

NGSS.HS-LS3-1

THIS IMAGE SHOWS WHAT IS HAPPENING WITH THE CHROMOSOMES?

• NON- DISJUNCTION

• METAPHASE

• TELOPHASE

• CROSSING OVER

To find out how much variation an organism with a diploid number of 20 chromosomes would have you would need to do the following

• 20^2

• 2^10

• 2^20

• 10^2

Tags

NGSS.HS-LS3-3

WHAT DOES MEIOSIS CREATE?

• CHROMOSOMES

• GAMETES

• DNA

• TRAITS

Tags

NGSS.HS-LS3-2