Genetics Problems

In guinea pigs, the alleles for black hair(B) is dominant to the allele for brown hair(b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

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-LS3-2

NGSS.HS-LS3-3

A roan cow shows co-dominance in fur color (brown and white). What is the phenotype ratio expected if a roan cow and a roan bull mate together?

• 100% Roan
• 50% Roan, 50% White
• 50% Brown. 50% Roan
• 25% Brown, 50% Roan, 25% White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

This type of inheritance pattern shows BOTH traits in possible offspring

• complete dominance
• incomplete dominance
• co-dominance
• dominant pattern

Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

• Red
• Red and White
• White
• Pink

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In chickens, feather color is codominant.  If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?

• 50%
• 0%
• 25%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

If butterflies can have straight or curly antennae, and curly is recessive; what is the possibility that a pure breeding straight who is crossed with a hybrid straight, will have offspring with straight antennae?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

In a flowering plant species, red flower color (R) is incompletely dominant over white flower color (W). What is the genotype of any red-flowering plant resulting from this species?

• rr
• R
• RR
• RR or Rr

In a flowering plant species, red flower color (R) is incompletely dominant over white flower color (W). What is the probability of having a white flowered plant if the parents were heterozygous red and homozygous red?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

Brown fur is dominant to white fur in dogs. A homozygous dominant dog is crossed with a heterozygous dog. 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

NGSS.HS-LS3-3