Living Environment Genetics Review

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which answer best describes codominant alleles?

• Both are equally dominant
• Both are equally recessive
• Neither are dominant or recessive

What is the percentage of offspring that have green pods?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Snapdragon flowers come in red, pink and white.  What type of inheritance is this?

• Complete Dominance
• Incomplete Dominance
• Codominance
• Polygenic Inheritance

What is one advantage of sexual reproduction?

• offspring are identical to parents
• offspring are resistant to viruses
• offspring are born live, rather thna from eggs
• offspring inherit a wider variety of genetic information

Tags

NGSS.HS-LS3-2

Which best describes the process shown?

• mutation in which the DNA content of the gene is ltered
• segregation of sister chromatids
• condensation and segregation of the alleles
• crossing-over which alleles are exchanged

W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?

• none
• 3/4
• 1/2
• all

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2