A buttefly has 4 offspring. 2 offspring are striped and 2 offspring are spotted. These results indicate these patterns are the result of a

Scientists excavate the skull of an extinct wolf. Based on the evidence, researches determine the extinct wolf diverged from modern wolfs 2 million years ago. What evidence did they use to determine this?

Imagine hair type is controlled by a single allele. Straight hair is recessive to curly hair. In a cross between 2 people with straight hair, what is the chance of them having a child with curly hair?

An individual has the genotype: yyBb. What percentage of gametes produced by this individual will have the genotype yB?

Pink flowers result because the alleles for red and white are codominant. When two pink flowers are crossed, what percentage of offspring are red?

In European deer, implantation of embryos are delayed. Deer mate in August but don't give birth until the following June. The embryo stays dormant from late summer until December. Which best explains why this happens?

Humans in Montana have hunted wolves to the point of extinction. What effect could this have on the deer population in that state?

Organisms can be classified based on homology, or shared characteristics inherited from a common ancestor. Recently, molecular biologists have been able to compare homologies at the genetic level. Why is this possible?

Two populations of rabbits are separated for some time by a great river. Over time, the river dries and some of rabbits from one population mate with rabbits from the other population. Which of the following is likely to occur?

Facial dimples and free ear lobes are traits expressed by dominant alleles. What is the phenotypic outcomes of a cross between a female with a DdFf genotype and a male with a ddff genotype?

Punctuated equilibrium can be caused by

Dandelions produce seeds that are light weight and blow easily with the wind. Why did the dandelions develop this adaptation?

The variation in dog breeds can best be explained by

North American possums and Australian kangaroos are both marsupials which allow their immature offspring to develop in an external pouch. How can this similarity best be explained?

Huntington's disease is a rare, inherited condition that affects people around 50 years of age. The allele for Huntington's is dominant. Which of the following statements is best supported by these facts?

Two remote islands contain 2 different species of palm trees which are similar, but do not interbreed. Which evolutionary process fails to occur?

A species contains 34 chromosomes. How many chromosomes are in the haploid cells?

Which of the following is NOT a mechanism for evolution?

What best explains the presence of leg bones in baleen whales?

What percentage of offspring in a dihybrid cross of DdFf and ddff are expected to be heterozygous for both traits?

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