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With the help of clear and labelled diagrams describe how aneuploids are formed.

In peas Tall (T) is dominant over dwarf (t), Yellow is dominant over green (y), and smooth (S) is dominant over wrinkled (s).What fraction of the offspring in the following cross would be homologous recessive for all gene pairs in the cross: YyTtss X YyttSs ?

Two parents with cleft chins, both heterozygous for cleft chin (Cc), have three children with cleft chins. The parents are sure that their fourth child will not have a cleft chin. Draw a Punnett Square to see if this is possible.

Determine the probability that the fourth child will have a cleft chin.

Using Models: What information does a Punnett square give? Does the Punnett square support the parents' prediction? Explain your answer.

Predicting: If these parents have a fifth child, what are the chances that the child will have a cleft chin? Explain your answer.

Determine the probability that the fourth child will have a cleft chin.

Using Models: What information does a Punnett square give? Does the Punnett square support the parents' prediction? Explain your answer.

Predicting: If these parents have a fifth child, what are the chances that the child will have a cleft chin? Explain your answer.

Describe how aneuploids are formed

Draw a pedigree chart that represents mary had children with greg; 2 sons and 1 daughter. Label the pedigree

A gene is found on the X chromosome of humans. A recessive allele leads to loss of the gene function. Using a notation that distinguishes a normal X chromosome and a mutated X chromosome, indicate the genotype of an affected male, a normal male, an affected female, a normal female who carries the mutation, and normal female who can have all normal sons. Try the same exercise for a mutated allele that is dominant over the normall allele.

A disease is caused by a recessive allele,d. Diseased individuals are thus homozygous recessive dd. What are the genotypes of the parents of a diseased child? Explain your answer.

in population that is in hardyweinberg equilibrium the friqvency of a recacive allile for a certain arridatary trait is 0.20 what % of the indivisaul in the next genration would be acepted to show the dominent trait

With the help of clear and labelled diagrams describe how aneuploids are formed.

1. [25%] Consider selection in a predator-prey model. Assume two haploid organisms. In the predator organism we consider a locus with alleles A and a; in the prey organism, we consider a locus with alleles B and b. Assume allele A provides the predator an advantage to hunt prey with genotype B. Plentiful prey of genotype B give A-predators a selective advantage. Then wA = 1 + fB s − t, where s and t are selection coefficients.

(A) [10%] Calculate the change in allele frequencies in the predator per generation. Simplify your equations.

(B) [10%] Assume now that allele B in the prey is disadvantaged if allele A is common in thepredator. ThuswB =1−fAs + t,wheres and tareselectioncoefficients. Calculatethe change in the allele frequencies in the prey in one generation. Simplify your equations.

(C) [5%] Is there a non-trivial equilibrium for fA and fB such that ∆fA = 0 and ∆fB = 0? By non-trivial, we mean when neither A nor B has frequency 0 or 1. If a non-trivial equilibrium exists, then characterize it?

(A) [10%] Calculate the change in allele frequencies in the predator per generation. Simplify your equations.

(B) [10%] Assume now that allele B in the prey is disadvantaged if allele A is common in thepredator. ThuswB =1−fAs + t,wheres and tareselectioncoefficients. Calculatethe change in the allele frequencies in the prey in one generation. Simplify your equations.

(C) [5%] Is there a non-trivial equilibrium for fA and fB such that ∆fA = 0 and ∆fB = 0? By non-trivial, we mean when neither A nor B has frequency 0 or 1. If a non-trivial equilibrium exists, then characterize it?