Genetics

You inherit (a)   alleles from EACH parent for a specific trait.

• 1
• 2

Tags

NGSS.HS-LS3-1

The physical expression of a trait is called the ...

• genotype

• phenotype

Genotype: TT is (a)  

• homozygous dominant
• homozygous recessive
• heterozygous dominant

Genotype: Aa

• homozygous dominant

• homozygous recessive

• heterozygous dominant

Cross 2 heterozygous tall pea plants. Tall (T) is dominant to short (t). What fraction of the offspring do you predict will be tall?

• 1/4

• 2/4

• 3/4

• 4/4

Tags

NGSS.HS-LS3-1

Which statement below describes DOMINANT alleles?

• expressed when at least one is present

• only expressed when 2 are present

Which of the following is a PHENOTYPE for flower color in pea plants?

• Pp

• PP

• Purple

Tags

NGSS.MS-LS4-4

In the problem shown, the genotype of the missing parent must be (a)   .

• BB
• Bb
• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, freckles (F) on the skin are dominant to no freckles (f).  If a heterozygous parent and a recessive parent conceive, what is the chances of having a child with NO FRECKLES?

• 0%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a population of bees, long wings (L) are dominant over short wings (l).  Bees with long wings are ...

• heterozygous only (Ll)

• homozygous 

  dominant only (LL)

• heterozygous or 

  homozygous 

  dominant (LL or Ll)

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2