Question

Suppose that in corn plants, the allele for short stalks is dominant over tall stalks and...

  1. Suppose that in corn plants, the allele for short stalks is dominant over tall stalks and the allele for white kernel color is dominant over purple kernel color. What would be the best way to determine the genotype of a corn plant with a short stalk and white kernels?

    Perform a test cross with a corn plant with a short stalk and white kernels

    Perform a test cross with a corn plant with a tall stalk and purple kernels.

    Perform a test cross with a corn plant with a short stalk and purple kernels.

    Perform a test cross with a heterozygous corn plant

  1. For the following statements (1-4) ,which would be descriptions associated with high survivorship species and which would be descriptions associated with low survivorship species?

    1. Expects a large percentage of its offspring to die before maturity.

    2. Invests small amount of resources in rearing offspring.

    3. Has relatively few offspring.

    4. Is usually long-lived.

    Low survivorship- 1 & 2

    High Survivorship- 3 & 4

    Low survivorship- 3 & 4

    High Survivorship- 1 & 2

    Low survivorship- 1 & 3

    High Survivorship- 2 & 4

    Low survivorship- 2 & 3

    High Survivorship- 1 & 4

Homework Answers

Answer #1

best way to determine the genotype is to perform a test cross with homozygous recessive plant, a tall plant with purple kernel. if the test plant was homozygous dominant none of test cross progeny will express the recessisve trait and if it was heterozygous the recessisve allele will be expressed.

low survivorship -1 and 3

as it produces low offsprings and which die before reproducing

high survivorship- 2 and 4

longer life span and low investment of resources will produce more offspring which will give the species chance to survive

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