genetic inheritance Flashcards
1
Q
some characteristics are controlled by a ___ ___
A
single gene
2
Q
what is an allele?
A
different forms of a gene
3
Q
what is the combination of alleles present known as?
A
the organisms genotype
4
Q
what are the characteristics that are expressed known as?
A
the organisms phenotype
5
Q
what type of allele is always expressed, even if only one copy is present?
A
the dominant allele
6
Q
what type of allele is only expressed if 2 copies are present?
A
the recessive allele
7
Q
if two of the same alleles are present, the organisms are ___ for that characterisic
A
homozygous
8
Q
what is meant by the word heterozygous?
A
when two different alleles are present
