Biology Chapter 11 Test

Gregor Mendel removed the male parts from the flowers of some plants in order to

• prevents hybrids from forming

• prevent cross-pollination

• controlled crosses between plants

• stimulate self-pollination

In the Punnett square shown in Figure 11-1, which of the following is true about the offspring resulting from the cross?

• about three fourths are expected to be tall

• about half are expected to be short

• all are expected to be tall

• all are expected to be short

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Situations in which one allele for a gene is not completely dominant over another allele for that gene are called

• polygenic inheritance

• multiple genes

• multiple alleles

• incomplete dominance

Unlike mitosis, meiosis results in the formation of

• body cells

• diploid cells

• haploid cells

• 2N daughter cells

A male and femal bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendel's principles explain(s) why the offspring is albino?

• independent assortment only

• segregation only

• dominance only

• dominance and segregation

Variation in human skin color is an example of

• incomplete dominance

• multiple alleles

• polygenic traits

• codominace

What is shown in Figure 11-4?

• independent assortment

• anaphase I of meiosis

• crossing-over

• replication

Gregor Mendel's principles of genetics apply to

• all organisms

• plants only

• pea plants only

• animals only

If two genes are on the same chromosome and rarely assort independently,

• the genes are probably located far apart from each other

• crossing-over never occurs between the genes

• the genes are probably located close each other

• crossing-over always occurs between the genes

Which of the following supports the claim that the environment can affect genetic traits?

• Pinion trees bear cones every other year.

• Oak trees get taller as they grow

• Hydrangea flower color varies

• Dandelion plants are self pollinating

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