4) Single gene traits and dominance Alyssa is breeding rabbits for a 4H competit

Question

4) Single gene traits and dominance Alyssa is breeding rabbits for a 4H competition. She is convinced that if she can breed a straight eared, brown bunny she will be a shoo in to win. She mates a straisht cared white bunny with a loppy cared brown bunny. Alyssa is disappointed when, out of four offspring, all are tan, two have floppy cars, and two have straight cars, She also knows that straight ear is a dominant trait over floppy ear. Given that ear shape and hair color are both determined by two different, single genes: (1/2 pt each) a. What is the dominance pattern of ear shape? b. What is the dominance pattern of hair co c. Fill out the following Punnett squares for each trait for Alyssa's two rabbits. Use S for the straight ears allele and s for floppy ears allele. Use B and W for brown and white hair color alleles. Ear Shape Hair Color d. Fill out the following table regarding the genotypes of all Alyssa's rabbits. Ear Phenotype Ear Genotype Hair Hair Genotype Phenotype White Parent Straight Parent 2 Floppy Offspring 1Straight Offspring 2 Straight Offspring 3 Floppy Offspring 4 Floppy Brown Tan an an Tan

Explanation / Answer

A. Dominance pattern of ear SS or Ss Straight ear

B. Dominance pattern of color - BB Bb brown and WW Ww White

C.

D. Parent 1 - Ss WW Straight white

Parent 2 - ss BB Floppy Brown

Offspring 1 Ss BW Straight Tan

Offspring 2 Ss BW Straight Tan

Offspring 3 ss BW Floppy Tan

Offspring 4 ss BW Floppy Tan

S s s s

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