7.genetics, population, genetics and ecosystem

Cards (14)

what does genotype mean?
all the alleles an organism carries on its chromosome (eg. Gg)
what does phenotype mean?
the physical/observable characteristic of an organism as a result of the genotype as well as environmental factors
if an organism is diploid, how many alleles do they carry for each gene?
2
what does codominant mean?
when both alleles are dominant to both are expressed in the phenotype
what does pure breeding mean?
when there are a homologous pair of alleles
what is an allele?
an alternative version of a gene
what does locus mean?
the specific location of a gene on a chromosome
what is monohybrid inheritance?
when a phenotype is controlled by a single gene
whats an example of monohybrid inheritance?
cystic fibrosis which is only expressed when the alleles are recessive
what is dihyrbid inheritance?
when 2 characteristics are determined by 2 different genes on 2 different chromosomes at the same time
what is sex-linkage?
expression of an allele dependant on the gender of the individual as the gene is located in the sex chromosome
what are the female and male chromosomes?
female - xx
male - xy
how many pairs of autosomal chromosomes are there?
22 pairs
how many pairs of chromosomes involved in sex determination? 
1 ( x or y)