Which statement about the pattern of inheritance for a recessive X-linked allele is true? A. Unaffected parents can produce daughters who are affected. B. Unaffected parents can have sons who are affected and daughters who are carriers. C. Unaffected fathers can be carriers. D. Affected parents do not produce affected children. E. Every affected person has an affected parent.

When a plant with red flowers is crossed with a plant with white flowers, the F1 generation consists of a plant with pink flowers. This is an example of which of the following modes of inheritance? A. multiple alleles B. incomplete dominance C. codominance D. complete dominance

You have just discovered a new species of squirrel with red eyes! In addition, you have determined that red eyes are a recessive trait that follow Mendelian patterns of inheritance. The dominant trait results in dark brown eye color. You observe a red eyed female squirrel with two offspring: one with red eyes and the other with dark brown eyes. What is the genotype of the father?   A. Homozygous dominant   B. Homozygous recessive   C. None of the above   D. Heterozygous

What must be true about the genotypes of parents who have a child who has an: a. dominant trait? b. recessive trait?