Chapter 16

Question 1

What is chromosomes?

Answer 1

a lenght of DNA,found in the nucleus of a cell

Question 2

What is DNA?

Answer 2

a molecules that contains genetic info

Question 3

what is a gene?

Answer 3

a lenght of DNA that codes for 1 protein

Question 4

What are alleles?

Answer 4

alternative forms of genes

Question 5

What does genes determine?

Answer 5

What the color of your hair or eyes are

Question 6

How m any chromosomes do we have in our cells?

Answer 6

46

Question 7

arrange the components in order of size,smallest first?

Answer 7

DNA moelcules
gene
chromosome
cell nucleus

Question 8

what does homozygous mean?

Answer 8

having 2 identical alleles of a partical gene (GG or gg)

Question 9

What does heterozygous mean?

Answer 9

having 2 different alleles of a partical gene (Gg)

Question 10

What is a genotype?

Answer 10

the genetic makeup of an organism in terms of the alleles present (GG)

Question 11

what is a phenotype?

Answer 11

the observable features of an organism

Question 12

What is dominant alleles ?

Answer 12

an allele that is expressed if it is present(G)

Question 13

What is a recessive allele?

Answer 13

an allele that is only expressed when there is no dominant allele present(g)

Question 14

How is sex determined?

Answer 14

X & Y chromosomes

Question 15

What is a females chromosomes?

Answer 15

XX

Question 16

What is a males chromosomes?

Answer 16

XY