Lecture 9 inheritance mendel Flashcards
1
Q
what is a gene
A
section of DNA that codes for a characteristic
2
Q
where is a gene found
A
locus a specific position on a certain chromosome
3
Q
what is an allele
A
variation of DNA a gene at that locus
4
Q
genotype
A
overall combination of alleles
5
Q
phenotype
A
the expression of a genotype
6
Q
test cross
A
known genotype is crossed with the unknown genotype
7
Q
Mendel: law of segregation
A
each gamete only possesses 1 of the 2 genes of parent
each gamete only receives one allele
8
Q
Mendel: law of independent assortment
A
alleles of different genes assort independently in gamete formation
9
Q
atavism
A
the tendency to revert to an ancestral type
traits reappear though to have disappeared
