Patterns of Inheritance I Chapter 21

Question 1

Refers to the genes of a individual

Answer 1

genotype

Question 2

___ are the segments of DNA on a chromosome that code for a trait.

Answer 2

genes

Question 3

Each gene is located in a specific position on the chromosome, called a _____.

Answer 3

locus

Question 4

______ are alternate forms of a genes
They are specifically what the gene codes for (example: a gene for eye can specifically code for blue, green, brown (these are ______.))

Answer 4

allele

Question 5

________ alleles mask or hide the expression of ________ alleles

Answer 5

dominant
recessive

Question 6

If the allele is dominant, only ___ copy of that allele needs to be present for that trait to be expressed

Answer 6

1

Question 7

If the allele is recessive, ___ copies of that allele needs to be present for the trait to be expressed

Answer 7

both

Question 8

If both chromosomes carry the dominant allele, the genotype is __________ ___________

Answer 8

homozygous dominant

Question 9

If both chromosomes carry the recessive allele, the genotype is _______ ___________

Answer 9

homozygous recessive

Question 10

If one chromosome carries the dominant allele and the other chromosome carries the recessive allele, the genotype is ______

Answer 10

heterozygous

Question 11

The physical appearance of a trait is called a ________

Answer 11

phenotype

Question 12

The phenotype is determined by the expression of the alleles in the ______

Answer 12

genotype

Question 13

___ from mom + ____ from dad = ____ total chromosomes

Answer 13

23
23
46

Question 14

Genotype determines _____

Answer 14

phenotype

Question 15

What are the 3 genotypes

Answer 15

Ff
FF
ff

Question 16

In a punnett square all alleles found in the sperm are lined up ______
and all alleles found in eggs are lined up ______

Answer 16

vertically
horizontally

Question 17

Review dihybrid cross