17.1 Studying inheritance Flashcards
1
Q
define genotype
A
the genetic constitution (make up) of an organism
2
Q
what does the genotype describe
A
the alleles of an organism
3
Q
define phenotype
A
the observable characteristics of an organism
4
Q
what does the phenotype result from
A
the interaction of the genotype with the environment
5
Q
define dominant alleles
A
the allele which is always expressed
usually shown as a capital letter
6
Q
define recessive
A
allele which is not expressed in the presence of a dominant allele
usually shown as lower case letter
7
Q
define co-dominant alleles
A
two alleles contribute to the phenotype
8
Q
define homozygous
A
two identical alleles
9
Q
define hetrozygous
A
two different alleles
10
Q
define multiple alleles
A
when a gene has more than two allelic forms e.g blood group A, B, AB, O
