What factors can support the long-term stability of a hybrid zone if theparent species live in different environments?

3. 3 I bbtal) Let's take a ślightly different look at the blue-eyed Mary Plants again. To remind you, the populations are dimorphic for dark blotches on the leaves --- some plants have blotches, and others don't. You have already determined earlier in the semester that Blotched is the dominant allele for this trait (use p for the dominant allele), and blotchless (no dark blotches on leaves) is the recessive allele for this trait (use g for the recessive allele). Leaves were sampled from each individual in a population of these plants, representing population in its entirety. The results are shown below: Remember our Hardy-Weinberg formulas: p² + 2pq +q² = 1 and p + q =1. Based solely on the phenotypic information given in the figure above, determine the following information (round to 2 decimal nlaces, please): :de d£h: q = 2pq- 2pqs What percentage of the plants are homozygous for the dominant allele?

WHAT IF If M. cardinalis individuals that had the M. lewisii yup allele wereplanted in an area that housed both monkey flower species, how might theproduction of hybrid offspring be affected?

A large plant arose in a natural population. Qualitatively, it looked just the same as the others, except much larger. Is it more likely to be an allopolyploid

(d) Scientists believe that the yellow fern arose from hybridization with another fern on the island. Create a diagram of this hybridization that tracks the origin of the chromosome number in the yellow fern.

What is interspecific hybridization. Give an example?

In Question 10p of Chapter 4, the genotype of parents of litters with the following phenotypes was determined as "Bbdd x bbDd." How was this phenotype determined based on the genotype: a. ) 4 brown, 4 black, 4 yellow and 4 cream 4 brown (4 B_D_) , 4 black (4 B_dd), 4 yellow (4 bbD_), 4 cream (4 bbdd)   Hoping to get feedback in the shortest possible time.

n the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either bumblebees or hummingbirds; lavender flowered I. marabaensis and red flowered I. cavalcantei. Which of the follwing data would support the suggestion of natural interspecific hybridization with weak postzygotic isolation?   A. magenta flowered hybrids found in the wild were infertile and bidirectionally crossing with parental species   B. magenta flowered hybrids found in the wild were preferentially pollinated by introduced honeybees rather than parental pollinators   C. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis showed a mixture of parental floral characteristics   D. In the laboratory, offspring resulting from crosses between I. cavalcantei, I. marabaensis and magenta flowered hybrid plants were autotropic and showed hybrid viability

5a) It is generally considered that blue or purplish colored flowers attract bees as pollinators. Red flowers often attract birds such as hummingbirds as pollinators. Is this an example of prezygotic or postzygotic isolating mechanisms? Why?   5b) The graphs in your textbook show that the parental species are partially isolated by living at somewhat different altitudes in the mountains. In nature, the two parental species are also strongly (but not completely) isolated by using different pollinators (bees vs. hummingbirds). Is the presence of altitudinal separation combined with different pollinators likely to give more reproductive isolation in nature compared to each isolating mechanism alone? Why?   5c) Do the figures showing the F2 generation of the flowers suggest that these traits of flower shape and flower color are polygenic or due to single gene loci?  Give a reason for your answer. 5d) Looking at the other graphs for this example that are shown in your textbook, is there any…