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Define gene
A section of DNA that codes for a protein
Define Allele
Different versions of a gene
Define Dominant allele
This type of allele decides the characteristic even when other alleles are there
Define Recessive allele
This type of allele will decide the characteristic only when no other type of allele is present.
Define Genotype
The combination of alleles of a gene. e.g. GG Gg and gg
Define Phenotype
This is the characteristics that is determined by the genotype e.g. GG and Gg
Define Homozygous
having two identical alleles of a gene
Define Heterozygous
having two different alleles of a gene
Why do organisms grow
to get extra cells
why do organisms repair tissues
Because they make replacement cells
Why do organisms reproduce asexually
Because they make new organism which will need cells
Why do organisms produce sperm or egg cells
gametes
What happens during stage 1 - 2 in mitosis
DNA replication
What happens during stage 2-4 in mitosis
Nuclear Division
How many chromosomes do the daughter cells have in comparison to the original cell.
The same number
How many cell divisions are there in Mitosis
1
How many cells are produced in mitosis
2 daughter cells
How many chromosomes do final cells have in Mitosis
46
What is mitosis used for in the body
growth and repair
Why does every organism on earth have an even number of chromosomes in its body cells
Because doubling the gamete number always gives an even number
Describe the function of DNA
To create all of the characteristics of living organisms
If cell C has 23 number of chromosomes why is it important that it has that many
Because the 23 chromosomes from the male gamete will fuse with the correct number