Inheritance B11 Flashcards
what does a DNA make
Genome
super coiled DNA
chromosomes
number of chromosomes in the human body
46, 23 pairs
a gene is a
genetic code for a particular protein
we have two versions of every gene this is
alleles
two types of alleles
dominant and recessive
role of dominant and recessive cell
dominant is the one that is shown or used, and the recessive cell is not shown
phenotype
characteristic that is shown by the person’s genes
genotype
combinations of alleles that codes a persons specific phenotype
how do you identify if the allele is dominant
it is written in a capital letter
homozygous
both alleles for a gene is identical
hetrozygous
the alleles are different for a gene
xx
woman
xy
man
fertilised cell -> 2 diploid cell
mitosis
fertilised cell -> 4 haploid cells
meiosis
variation
differences between organism
discontinuous variation
limited sets of groups
continuous variation
data can be any value in a range
reason of genetic variation/mutation
differences in genes, alleles, environmental
evolution
simple organism to more complex organism
natural selection
survival out of competition
same species evolving in to different separate species
speciaiton
selective breeding
humans choosing organisms that have beneficial characteristics and breeding it.