Mendelian Genetics

Question 1

Genes

Answer 1

unit of instruction located on the chromosome

-each new gene will influence a specific trait

Question 2

Inherited Trait

Answer 2

trait that is genetically determined and pass on through generations

Question 3

Heredity

Answer 3

action of passing on physical characteristics from one generation to the next

Question 4

Allele

Answer 4

alternate form of a gene

Question 5

Dominant Allele

Answer 5

Uppercase

-dominant allele completely masks the expression of the recessive allele

Question 6

Recessive Allele

Answer 6

Lowercase

-only expressed in homozygous form (rr)

Question 7

Homozygous

Answer 7

when both alleles of a gene pair are the same (RR or rr)

Question 8

Heterozygous

Answer 8

when each allele of a gene is different (Rr)

Question 9

Genotype

Answer 9

actual genetic makeup represented by letters representing the genetic code

Question 10

Phenotype

Answer 10

what is physically expressed. Physical expression of a genotype.

Question 11

Multiple Alleles

Answer 11

When traits are determined by more than 2 alleles

-hierarchy of dominance

Question 12

Incomplete Dominance

Answer 12

When 2 alleles are equally dominant

• interact to form a new phenotype
• half expressed
  ex. Red and White = pink

Question 13

Co-Dominance

Answer 13

One allele does not dominate over the other, but instead they share dominance

• both alleles are fully expressed
  ex. spots of colour

Question 14

Probability

Answer 14

AND = MULTIPLY
OR = ADD