Budgies (Melanopsittacus undulatus) are attractive birds that come in many colors. Budgies may produce either or both of two types of pigment in their feathers: a blue pigment and a yellow pigment. Whether or not each pigment is produced is governed by one gene with two alleles. Blue pigment (B) is dominant to no blue pigment (b), and yellow pigment (Y) is dominant to no yellow pigment (y). A budgie that produces neither blue nor yellow pigment in its feathers looks white. A budgie that produces both blue and yellow pigment in its feathers looks green. A. What is/are the possible genotype(s) of a yellow budgie? B. What is the phenotype of a budgie with the genotype BbYy? C. Suppose you cross a homozygous blue budgie with a homozygous white budgie. Predict the results of this cross, both genotype and phenotype. D. Now suppose you cross one of the offspring from the mating in part C with a budgie whose genotype is BbYy. Predict the results of your cross. What are the expected genotypes and phenotypes of the offspring from this cross, and in what ratios?
Evolutionary Genetics
Evolution is known as continuous changes that occur to adjust organisms in their changing environment over many generations. Various theories have been proposed to illustrate the origin of life and organic evolution. The most accepted one is the theory of natural selection by Charles Darwin. According to his postulate, organisms undergo a struggle for existence due to overproduction. To survive in nature, they acquire variations. The inheritable variations are selected by nature, and it leads to the survival of the fittest.
Phenotype Frequency
The majority of populations have a certain degree of variation in their genetic pools. Scientists can predict the genetic variation happening over time by measuring the amount of genetic variation in a population and these predictions assist them in gaining important insights into the processes that allow organisms to adapt to the environment or to develop into new species over generations. This process is referred to as the process of evolution.
Hardy Weinberg Equilibrium
The frequencies of allele and genotype were maintained constant from one generation to another due to the absence of other evolutionary forces. It is otherwise called the Hardy Weinberg principle the field of population genetics.
Budgies (Melanopsittacus undulatus) are attractive birds that come in many colors. Budgies may produce either or both of two types of pigment in their feathers: a blue pigment and a yellow pigment. Whether or not each pigment is produced is governed by one gene with two alleles. Blue pigment (B) is dominant to no blue pigment (b), and yellow pigment (Y) is dominant to no yellow pigment (y). A budgie that produces neither blue nor yellow pigment in its feathers looks white. A budgie that produces both blue and yellow pigment in its feathers looks green.
A. What is/are the possible genotype(s) of a yellow budgie?
B. What is the phenotype of a budgie with the genotype BbYy?
C. Suppose you cross a homozygous blue budgie with a homozygous white budgie. Predict the results of this cross, both genotype and phenotype.
D. Now suppose you cross one of the offspring from the mating in part C with a budgie whose genotype is BbYy. Predict the results of your cross. What are the expected genotypes and
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