Genetics/Punnett squares

An organism with the genotype DD for a trait is __. Select all that apply.

• dominant

• recessive

• homozygous

• heterozygous

Tags

NGSS.HS-LS3-1

In the following Punnett Square, R represents red scales and B represents blue scales.  If scale type shows co-dominance in fish, what is the probability of each color in the offspring?

• 50% blue, 50% red and blue, 0% red
• 50% purple and 50% blue
• 100% red and blue
• 0% red, 0% blue, 100% red and blue

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

Which choice best represents the genotype of this cross?

• 1 Yy: 2 yy: 0 YY
• 2 Yy: 2 yy: 0 YY
• 3 Yy: 1 yy: 0 YY
• 1 Yy: 3 yy: 0 YY

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which of the following genotypes is homozygous dominant?

• aa

• Aa

• AA

Which of the following genotypes is heterozygous?

• Bb

• BB

• bb

The different forms of a gene

• alleles

• atoms

• proteins

• wheels

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This trait is hidden whenever the dominant allele is present

• dominant allele

• codominance

• recessive allele

• Punnett Square

Tags

NGSS.HS-LS3-1

This trait always shows up in an organism when the allele is present

• dominant allele

• codominance

• probability

• recessive allele

Tags

NGSS.HS-LS3-1

Black fur is dominant (B) over white fur (b).  Find the probability of heterozygous offspring using the following genotype of these parents.
Bb + bb

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3