TOPIC 3.4 TERMINOLOGY

Question 1

Genotype

Answer 1

Symbolic rep of pair of alleles possessed by organism

Question 2

Phenotype

Answer 2

Characteristics of an organism

Question 3

Dominant allele

Answer 3

Allele that has same effect on phenotype whether paired with same allele or different one. Dominant alleles always expressed in the phenotype.

Question 4

Recessive allele

Answer 4

Has an effect on phenotype only in homozygous state

Question 5

Co-dominant alleles

Answer 5

Pairs of alleles that both affect phenotype when present in a heterozygote

Question 6

Locus

Answer 6

Particular position on homologous chromosomes of a gene. Each gene foun at a specific place on a specific pair of chromosomes.

Question 7

Homozygous

Answer 7

Having two identical alleles of a gene

Question 8

Heterozygous

Answer 8

Having two diff alleles of a gene. Bc paternal allele diff from maternal.

Question 9

Carrier

Answer 9

Has recessive allele but does not affect phenotype.

Question 10

Inheritance

Answer 10

Passing down of traits from one generation to another

Question 11

Autosome

Answer 11

Non-sex chromosome