Bio Exam 3 Terms

Question 1

Unit of hereditary; encodes the characteristics that determines a phenotype

Answer 1

Gene

Question 2

Alternate versions of the same gene at the same locus (in homologous pair) –gene pairs

Answer 2

Alleles

Question 3

Both homologous chromosomes carry the same allele at a given gene locus (YY or yy)

Answer 3

Homozygous

Question 4

Two homologous chromosomes carry different alleles at a given locus (Yy)

Answer 4

Heterozygous

Question 5

Genetic makeup of an organism, determines phenotype (example: Yy)

Answer 5

Genotype

Question 6

Appearance or characteristic of an organism = physical traits (example: yellow seeds)

Answer 6

Phenotype

Question 7

Allele that dominates over others in determining phenotype (capital letter)

Answer 7

Dominant

Question 8

Allele whose phenotypic expression is “hidden” when a dominant allele us present (lowercase)

Answer 8

Recessive

Question 9

Evaluate the inheritance pattern of 1 trait

Answer 9

Monohybrid cross

Question 10

Evaluate the inheritance patter of 2 traits

Answer 10

Dihybrid cross