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WorksheetsMEIOSIS
Total questions: 17
Worksheet time: 9mins
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)
THE STRUCTURE THAT CONTAINS THE DNA IS CALLED (CHOOSE THE MOST SPECIFIC ANSWER)
CHROMOSOME
CELL BODY
CELL
NUCLEUS
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
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
THIS IMAGE SHOWS WHAT IS HAPPENING WITH THE CHROMOSOMES?
NON- DISJUNCTION
METAPHASE
TELOPHASE
CROSSING OVER
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
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
Chromosomes assort independantly, not genes because of the following
The chromosomes contain the genes, genes can't leave the chromosome
The genes contain the chromosomes
It depends on the sex of the offspring
In sexual selection of most organisms the genes will be directed by the DNA to assort independantly
Explain the karyotype of this individual
Male - no genetic defect
Male - Down's Syndrome
Female - no genetic defect
Female - Down's Syndrome
