The domestic dog belongs to the species Canis familiaris. The great dane, golden retriever, cocker spaniel, fox terrier and chihuahua are different breeds within this species. a List some differences between these breeds. b List some differences within one of these breeds. c Considering the differences in size between the largest and smallest of these breeds, explain how it is that they are all considered to belong to the same species.

Compare the genetic relationship of the parent pest and its offspring. Use the word: GENETICALLY IDENTICAL/DIFFERENT, GENETIC RECOMBINATION. USE THIS SENTENCE STARTER: The parent pest and its offspring are (genetically identical/different) because...

A farmer bought a herd of 500 sheep, taken from a freely breeding population, and later found that 25 of the animals had an economically undesirable feature, crinkly-hair, caused by the recessive allele (c). Assume Hardy-Weinberg Equilibrium.  The owner then separates all those animals showing crinkly-hair and sends them for slaughter. He allows the remaining animals to breed freely. What proportion of the next generation of lambs would be expected to show crinkly hair?

Two species of beetle are physically unable to mate with one another, despite being otherwise morphologically identical, because of the different structure of their reproductive organs.  What type of isolating mechanism is involved? Group of answer choices A. behavioral isolation B. gametic isolation C. mechanical isolation D. temporal isolation E. habitat isolation

In a species of beetle, the size and color of the wings are controlled by two distinct genes. There are two alleles for the size gene: the big allele makes wings large, and the small allele makes them smaller. There are two alleles for the color gene: red and yellow. You are able to estimate the frequency of the four haplotypes from a museum collection from 60 years ago. You also estimate haplotype frequencies in the present day. The data are shown in the table below. Museum (60 ya) Present day big/red 0.69 0.5452 big/yellow 0.00 0.1448 small/red 0.09 0.2348 small/yellow 0.22 0.0752 A) What is linkage disequilibrium (LD) between the size and color loci in the museum collection? What is LD in the present day? B) Assuming one generation per year, what is the recombination fraction between the size and color loci?

Use each of the following species concepts to write a claim about whether the dark and light fur mice are, in fact, different species. Your claim should demonstrate your understanding of that particular species concept. Mice with light coat colors are found in populations scattered across the southeastern US. Researchers believe the light coat color emerged in a single population.   How would a biologist explain the evolution of the light coat color in populations across the southeastern US? Briefly explain your reasoning.

You are surveying population genetics of snails while studying abroad in New Zealand.  At your locus of interest, you have AA: 32 Aa:46 aa: 22.  Identify the statement that accurately describes this population.   a. The genotype frequency of AA is 0.77.   b. The frequency of the A allele is  0.45.   c. The genotype frequency of the heterozygotes is 0.45.   d. The frequency of the a allele is 0.23.

Explain your answer in some depth and avoid just saying "It is A" or It is B. Defend your answer and explain why you choice that answer choice.    Question: Which would be an example of two populations considered separate species based on the lineage species concept? Group of answer choices   A) Two squirrel populations in which one was red and the other was brown   B) Two warbler populations in which the females strongly prefer to mate with males of the same population   C) Two plant populations that are capable of producing fertile hybrids   D) Two dragonfly populations that have accumulated several differences in their DNA sequences   Question: If a mountain range has forest on the western slope and desert on the eastern slope, what is the direction of the prevailing winds? A) East to west B) South to north C) North to south D) West to east (Is this correct? Why?)

Albinism is due to a recessive allele of an autosomal gene. Let a represent the albino allele and A represent the normal non-albino allele. If one out of every 10,000 people were albino and assuming that the population is in Hardy-Weinberg equilibrium, A. what would be the phenotype frequencies of albino and non-albino ? B. what would be the allele frequencies of a and of A? C. what fraction of people can be expected to be of the genotype Aa? D. what fraction of people can be expected to be of the genotype AA?