2.2 - inheritance & mendelian genetics

Question 1

dominant alleles

Answer 1

determine trait even if only one copy of allele

Question 1

alleles

Answer 1

different versions of same gene

Question 2

recessive allele

Answer 2

determine trait only if two copies present

Question 3

phenotype

Answer 3

trait controlled by genotype

Question 4

genotype

Answer 4

combination of alleles present in individual

Question 5

why can some alleles not be expressed

Answer 5

if the gene is an essential gene - certain allele required for vital function

Question 6

T/F - genes only have 2 alleles

Answer 6

F - many genes have more than 2 alleles

Question 7

co-dominance

Answer 7

2 different dominant alleles present - produce combination of both alleles in phenotype

Question 8

pleiotropy

Answer 8

single gene mutation can cause range of phenotypes

Question 9

genetic heterogeneity

Answer 9

same phenotype can be caused by range of different genes

Question 10

polygenic traits

Answer 10

controlled by more than one gene