inheritance

Question 1

gene

Answer 1

a specific sequence of bases on a chromosome that codes for one or more polypeptides

Question 2

allele

Answer 2

different forms of a gene. there can be many different forms of the same gene. most organisms carry two copies, one from each parent

Question 3

nucleotides

Answer 3

unit of dna or rna. consists of a nitrogenous base, pentose sugar and phosphate

Question 4

genotype

Answer 4

genetic constitution of an organism

Question 5

phenotype

Answer 5

the expression of the genotype and its interaction with the environment

Question 6

dominant

Answer 6

an allele that is always expressed in the phenotype of an organism. represented by a capital letter

Question 7

recessive

Answer 7

an allele that is only expressed if two copies are present. represented by a lowercase letter

Question 8

codominant

Answer 8

alleles are both expressed in the phenotype and neither is recessive

Question 9

locus

Answer 9

fixed position of a gene on a chromosome

Question 10

homozygous

Answer 10

organism carried two copies of the same allele

Question 11

heterozygous

Answer 11

organisms carries two different alleles

Question 12

carrier

Answer 12

individual carrying an allele that is not expressed in the phenotype that could be passed onto the offspring

Question 13

multiple alleles

Answer 13

a gene that has two or more alleles. an organism will have two alleles, one on each homologous pair of chromosomes