Chapter 11 Biology

What type of inheritance do two alleles have if their traits blend together? 

• Incomplete Dominance
• Co-Dominance
• Mendelian Inheritance
• Homozygous Inheritance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance
• Co dominance
• Independent assortment
• Recessive inheritance

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

• 4: Orange and White
• 1: Orange : 1 White
• 2 Orange: 2 Orange and White: 0 White
• 1: Orange: 2 Orange and White: 1 White

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

• Red
• Red and White
• White
• Pink

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In fruit flies, eye color is a sex linked trait. Red is dominant to white. What would be the percentages of offspring of a cross of a white eyed female with a red-eyed male?

• 1 female white eyes, 1 female red-eyes, 1 male white eyes, 1 male red-eyes
• 2 female red eyes, 2 males white eyes
• 2 female white eyes, 2 males red eyes
• 2 female red eyes, 1 male red eyes, 1 male white eyes

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What percentage of the offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

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What percentage of the female offspring will be a carrier for this recessive disease?

• 0%
• 50%
• 100%
• 25%

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How many PAIRS of sex chromosomes do humans have?

• 23
• 46
• 1
• 2

What gender is this individual?

• male
• female
• we cannot tell using a karyotype?

The range of human skin colors is caused by a variety of genes, each of which has at least 2 alleles.  This is an example of:

• incomplete dominance
• codominance
• sex-linked
• polygenic inheritance