Genetics Review Day

The physical expression of a genetic trait is called a

• mutation

• genotype

• crossing over

• phenotype

Tags

NGSS.HS-LS1-1

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

B=brown eyes
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

• 100% Pp (purple)
• 50% Pp (purple); 50% pp (white)
• 75% Pp (purple); 25% pp (white)
• 25% PP, 50% Pp, 25% pp
  75% purple, 25% white

A-Tall

a-short

What is the chances of growing a tall plant?

• 1/4

• 2/4

• 3/4

• 100%

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?

• 
• 
• 
• 

If something is heterozygous, it is also...

• purebred
• hybrid
• dominant
• recessive