Genetics Vocab Quiz 1

Question 1

Dominant trait

Answer 1

This type of trait shows up whenever the gene is present.Represented by a capital letter

Question 2

Recessive Trait

Answer 2

This type of trait shows up only when two copies of the gene are present. It will not show up if a dominant gene is present.Represented by a lowercase letter

Question 3

Gene

Answer 3

A section of a chromosome that codes for a specific trait.

Question 4

Trait

Answer 4

A physical characteristic of an organism or cell controlled by genes. Examples: Hair color; Type 1 diabetes; Blood type

Question 5

<p>

| Heterozygous</p>

Answer 5

<p>
	The alleles (letters) are different for heterozygous traits (Bb)</p>

Question 6

Homozygous

Answer 6

The alleles (letters) are the same for homozygous traitsBB or bb

Question 7

Purebred

Answer 7

Means the same as Homozygous: The alleles (letters) are the same for this trait.BB or bb

Question 8

Hybrid

Answer 8

Means the same as Heterozygous: The alleles (letters) are different for this trait.Bb

Question 9

Phenotype

Answer 9

The phenotype is determined by the genotype. It is the physical appearance of a trait or how it manifests itself in the organism.

Question 10

BB

Answer 10

Homozygous Dominant:Homozygous because the letters are the same and dominant because they are both big.

Question 11

bb

Answer 11

Homozygous Recessive:Homozygous because the letters are the same and recessive because they are both lowercase.

Question 12

Bb

Answer 12

Heterozygous: Heterozgyous because the letters are different. A trait is not said to be “Heterozygous Dominant.”

Question 13

Genotype

Answer 13

The genetic makeup of an organism. In other words what letters they get.Ex. BB, bb or Bb

Question 14

<p>

| Allele</p>

Answer 14

<p>
A version of a gene. Often represented with capital or lowercase letter. There may be more than two alleles for a trait.</p>