1alleles are described as environmental factors that affect

Question

1.Alleles are described as ______.

environmental factors that affect gene expression

alternate versions of a gene

Punnett squares

homologous chromosomes

2.Freckles show a dominant inheritance pattern. What is the phenotype of the individual below?
Impossible to tell
FF
Ff
Freckled trait


3.In pea plants, seed shape is a trait controlled by a single gene. The round seed trait is dominant to the wrinkled seed trait. What is the genotype of a plant that is homozygous for wrinkled seeds?
RR
rr
wrinkled
Rr

 

4.In pea plants, purple is the dominant trait in terms of flower color. What is the phenotype of the pea plant flower below?

picture is white flower

White flower trait

pp

Impossible to tell

Pp

5.In pea plants, purple is the dominant trait in terms of flower color. What is the phenotype of the pea plant flower below?

picture is white pea plants flower

Pp

Impossible to tell

pp

White flower trait

 

6.In pea plants, seed color is a trait controlled by a single gene. The yellow seed trait is dominant to the green seed trait. What is the genotype of a plant that is heterozygous for yellow seeds?

yy

Yy

YY

yellow

7.In pea plants, purple is dominant to white in terms of flower color. In a genetic cross of two individuals that are heterozygous for this trait, what fraction of the offspring will have white flowers?

3/4

1/2

1/4

All

8.The purpose of DNA profiling is to  ______.

definitively convict a suspect

determine whether two samples of DNA came from the same individual

transfer genes from one species to another species

assess the safety concerns associated with genetically modified organisms

9.You performed gel electrophoresis and this is how your gel came out:

 

You refer to your notebook to see what sample was loaded into each well. Going from top to bottom:

Lane 1 Standard

Lane 2 Blood collected from crime scene

Lane 3 Human hair collected from crime scene

Lane 4 Victim

Lane 5 Body fluid collected from crime scene

Lane 6 [Empty]

Lane 7 [Empty]

Lane 8 Suspect 1

Lane 9 Suspect 2

Lane 10 Suspect 3

Which of the following can you conclude?

 

The human hair collected from the crime scene belongs to the victim.

The human hair collected from the crime scene belongs to Suspect 1.

The body fluid is a match to Suspect 3.

The blood collected from the crime scene indicates the victim lost a lot of blood.