Genetics and Punnett Squares

What is a GENOTYPE?

• the genetic make-up of an organism

• the physical trait of an organism

• mitosis

• meiosis

Tags

NGSS.HS-LS3-1

The physical appearance of a trait is known as the-

• genotype

• phenotype

• Homozygous

• intelligence

Tags

NGSS.HS-LS3-3

In plants, tall (T) is dominant to short (t).

Draw a punnett square and perform the following cross: Tt x Tt

What is the probability of producing a short plant?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous brown mouse BB is crossed with a heterozygous brown mouse Bb (tan is the recessive color).

Perform a punnett square cross and determine the phenotype & %.

• 100 % tan

• 100 % brown

• 50 % brown and 50% tan

• 75 % brown and 25 % tan

What genotype would go in box 1?

• BB

• Bb

• bb

• Bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the possible genotypes for this cross? And what percentage of each is produced?

• TT = 25% Tt= 50% tt=25%

• all tall

• TT= 75% tt = 25%

• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

• Protein

• DNA

• RNA

• Glucose nucleic acid (GNA)

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

In a heterozygous genotype, the ___________ allele takes hides the recessive allele in the phenotype.

• recessive

• dominant

• lower case letter

• both