Question

1. What factors are involved in genetic vaariation? Can the concepts be both detrimental and beneficial? Give examples. 2. For a given population, what 3 mechanisms other than natural selection can result in changes in gene frequencies (microevolution)? How do each of these operate? 3. Compare and contrast artificial and natural selection, How do these concepts affect fitness in certain population? How does this affect evolution of a species?o ono s 4. Consider the effect of selection on the length of cars in a population of feral goats. For each graph below, draw the shape of the curve after many generations of the type of selection indicated. The dotted curve shows the starting distribution of the population. Draw your curve over it. DRECTIONAL SELBCTION FOR SHORTER EARS STABLZING SELECTION DISRUPTIVE SELECTION Langh of ears nd uny anio leme Langth of ears vo codt Lengh of ears o otaub n blonde nodibo00 odar obol0 bonniang-llo wola lo noitsbion ARCE kouen

Please answer 1 to 4

Answer 1

Ques 1:

The factor which generates genetic variation in the genome are following : *meiosis during crossing over , *mutation, * selection.

The genetic variation can both be detrimental as well as beneficial.

Detrimental: The mutation at 6th position chain of beta globin chain leads to reduce the binding capacity of oxygen by haemoglobin. When such mutation is found in homozygous condition can cause death of a person.

Beneficial : the same mutation protect the person from malaria I malarial region. Because in heterozygous condition, the RBC are in sickle cell shaped which do not allow psthogen for completing its life cycle.

Que2:

The genetic frequency can be changed by following frequency:

* Mutation: the presence of mutation change the sequence of gene.

* migration: The migrated individual when mate with the local people enhance the variations in a population.

* Genetic drift: When there is random fixation of one allele occur. It cause homozygous population for one gene.

Question 4:

SLruph- Airectienal Felaction tobidisng -Ve