unit 7: genetics, populations, evolution & ecosystems

Question 1

genotype

Answer 1

the genetic constitution of an organism
-describes all the alleles that an organism has

Question 2

phenotype

Answer 2

observable characteristics of an organism
-result of the interaction between the expression of the genotype and the environment

Question 3

gene

Answer 3

length of dna that codes for a particular polypeptide

Question 4

locus

Answer 4

position of a gene on a particular dna molecule

Question 5

allele

Answer 5

version of a gene

Question 6

dominant allele

Answer 6

only a single allele is required for the characteristic to be expressed in the phenotype

Question 7

recessive allele

Answer 7

the characteristic is only expressed if there is no dominant allele

Question 8

codominant alleles

Answer 8

both alleles are expressed equally and contribute to the phenotype, with there either being a blend of the two character us or both characteristics being seen together

Question 9

pure breeding

Answer 9

homozygous pair of alleles

Question 10

monohybrid inheritance

Answer 10

when a phenotype or trait is controlled by a single gene

Question 11

monohybrid inheritance

Answer 11

when a phenotype or trait is controlled by a single gene