Inheritance

Question 1

How is DNA stored in the nucleus?

Answer 1

As linear chromosomes wrapped around proteins called histones

Question 2

What is a gene?

Answer 2

short section of a chromosome that carries info to code for one protein

Question 3

What is an allele?

Answer 3

alternative form or version of a gene

Question 4

What is a genotype?

Answer 4

all that alleles we have that control the characteristics

Question 5

How many alleles do we have for each gene?

Answer 5

2 one from each parent

Question 6

What is a phenotype?

Answer 6

visible characteristics of an organism

Question 7

What is homozygous?

Answer 7

two of the same alleles of the gene

Question 8

What is heterozygous?

Answer 8

two different alleles of that gene

Question 9

If an individual always has at least one dominant allele what does it determine?

Answer 9

the phenotype

Question 10

what are dominant alleles?

Answer 10

only one dominant allele needed to determine phenotype

• capital letter

XX

Question 11

what are recessive alleles?

Answer 11

only determine phenotype if there’s only two types of this allele

• lowercase

xx