For each of the five examples below, give the name of the isolating mechanism and specify if it is prezygotic or postzygotic isolation. a. In some bee population, only large bees are big enough to unfold flower petals and obtain nectar and pollen. b. A cross between two fish species occurs but development only occurs up to 16-cell stage. c. In drosophila, when sperm

For each of the five examples below, give the name of the isolating mechanism and specify if it is prezygotic or postzygotic isolation. a. In some bee population, only large bees are big enough to unfold flower petals and obtain nectar and pollen. b. A cross between two fish species occurs but development only occurs up to 16-cell stage. c. In drosophila, when sperm

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter19: Evolutionary Change In Populations

Section: Chapter Questions

Problem 12TYU

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Direction: For each of the five examples below, give the name of the isolating mechanism and specify if it is prezygotic or postzygotic isolation. In some bee populations, only large bees are big enough to unfold flower petals and obtain nectar and pollen. A cross between two fish species occurs but development only occurs up to 16-cell stage. In drosophila, when sperm from one species enters the other species, the sperm is immobilized and unable to fertilize the Fireflies have a unique lighting pattern. The frequency of lighting is species specific. Fireflies in the same area will not mate with those having a different lighting frequency. 5. Two species of butterflies are found in northern Michigan, but one species is found only near rivers and streams, the other near lakes
A. Direction: For each of the five examples below, give the name of the isolating mechanism and specify if it is prezygotic or postzygotic isolation. a. In some bee population, only large bees are big enough to unfold flower petals and obtain nectar and pollen. b. A cross between two fish species occurs but development only occurs up to 16-cell stage. c. In drosophila, when sperm form one species enters the other species, the sperm is immobilized and unable to fertilized egg. d. Fireflies have a unique lighting pattern. The frequency of lighting is species specific. Fireflies in the same area will not mate with those having a different lighting frequency. e. Two species of butterflies are found in northern Michigan, but one species is found only near rivers and streams, the other near lakes. B. Read analyze the statements given below. Then, justify your answer. a. A common farming practice is to breed a female horse with a male donkey. The result is a very robust animal – the mule.…
Scenario: plant species has flowers that can be red, pink, or white. Flower color is controlled by one gene with two alleles, A (p) and a (q). Red flowers are produced by AA homozygotes, pink flowers are produced by Aa heterozygotes and white flowers are produced by aa homozygotes. A recent survey of 100 of these plants found the following number of different flower colors: 75 plants with red flowers, 20 pink flowers, 5 white flowers. Question: Among 500 plants, how many of the 'AA' genotype are expected under Hardy-Weinberg?
Give typing answer with explanation and conclusion Imagine a recessive autosomal genetic disorder that causes death before sexual maturity. Which of the following best helps explain why such alleles persist in populations for long periods of time? Group of answer choices A. This allele is not heritable. B. Some individuals with the allele have the same fitness as individuals without the allele. C. Because they die before sexual maturity, there is no heritable variation in this population. D. The mutation rate of this gene probably is very high, creating this recessive allele every generation
ASAP PLEASE In Talons, the feral style (S) is dominant over the gladiator style (s), and green eyes (G) are dominant over yellow (g). If a Talon that is heterozygous for both traits is crossed with a Talon that is homozygous recessive for both traits, what is the predicted genotype of the offspring? A)SsGg and Ssgg B)SsGg only C)SsGg, ssgg, ssGg, Ssgg D)ssGg and ssgg only
Assume you are studying development in two species of iguana. You determine that a certain gene, "SPN2" turns on and off at different times in the two different species. The difference in timing leads to a different body length between the two iguana species. This phenomenon is an example of which of the following terms? a. Punctuated Equilibrium b. Pleiotropy c. Gene duplication d. Heterochrony
Review why you might see a cline across a geographical area. Explain why you are more likely to see a cline when there is gene flow between populations. What could happen if the gene flow becomes restricted across a cline? Explain.
Scenario: A plant species has flowers that can be red, pink, or white. Flower color is controlled by one gene with two alleles, A (p) and a (q). Red flowers are produced by AA homozygotes, pink flowers are produced by Aa heterozygotes and white flowers are produced by aa homozygotes. A recent survey of 100 of these plants found the following number of different flower colors: 75 plants with red flowers, 20 pink flowers, 5 white flowers. What are the observed allele frequencies in this population?
Scenario: A plant species has flowers that can be red, pink, or white. Flower color is controlled by one gene with two alleles, A (p) and a (q). Red flowers are produced by AA homozygotes, pink flowers are produced by Aa heterozygotes and white flowers are produced by aa homozygotes. A recent survey of 100 of these plants found the following number of different flower colors: 75 plants with red flowers, 20 pink flowers, 5 white flowers. What are the observed genotype frequencies in this population?
INTERPRET DATA In a population at genetic equilibrium, the frequency of the homozygous recessive genotype (tt) is 0.16. What are the allele frequencies of T and t, and what are the expected frequencies of the TT and Tt genotypes?
Which of these is an example of a key innovation? A caterpillar of a butterfly species provides honey to an ant colony in order to receive protection and care. A founding population of honeycreepers evolves beaks capable of cracking the seed of a tree species in their new habitat. A new flower color morph arises in a plant population, but an associated pollinator does not distinguish flowers by color. Co-occurring diploid species of wheat and goatgrass hybridize to form a viable tetraploid offspring that can no longer breed with its parents.
Would each of the following examples of reproductive isolation be considered a prezygotic or postzygotic mechanism? A. Horses and donkeys can interbreed to produce mules, but the mules are infertile. B. Three species of the orchid genus Dendrobium produce flowers 8 days, 9 days, and 11 days after a rainstorm. The flowers remain open for 1 day. C. Two species of fish release sperm and eggs into seawater at the same time, but the sperm of one species do not fertilize the eggs of the other species. D. Two tree frogs, Hyla chrysoscelis (diploid) and Hyla versicolor (tetraploid), can produce viable offspring, but the offspring are sterile.