When does a human egg cell accomplish its meiotic division?

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#Question id: 19025

#Unit 8. Inheritance Biology

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows: C

                         

Assume Hardy-Weinberg equilibrium,  the frequencies of the A and B alleles are 0.26 and 0.07, respectively. You now examine the ABO blood types in a new population. You observe that the A, B, and O blood types all have equal frequencies in this population. What are the frequencies of the A and O alleles in this population?

TLS Online TPP Program

#Question id: 19026

#Unit 8. Inheritance Biology

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows:

                             

Assume Hardy-Weinberg equilibrium, the frequencies of the A and B alleles are 0.26 and 0.07, respectively. You now examine the ABO blood types in yet another population. You observe that the AB blood type has a frequency of 0.50 in this population. What are the frequencies of the A and O alleles in this population?

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#Question id: 19106

#Unit 8. Inheritance Biology

Assume that mating is random. First, consider an autosomal recessive disease that is usually lethal in childhood, and that has an incidence among newborns of 1/3000. What mutation rate would be required to maintain this frequency in the population? 

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#Question id: 26790

#Unit 8. Inheritance Biology

 Assuming that the A, B, C and D genes are not linked, the probability of a progeny being AaBBccDd from a cross between AABbccDd and aaBBccDD parents will be 

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#Question id: 26791

#Unit 8. Inheritance Biology

There are four genes which control the phenotype and assort independently such as A, B, C and D. If the genotype Aa Bb Cc Dd is selfed then what is the probability for progeny which shows the dominant phenotype for AT LEAST ONE of  phenotypes controlled by

genes A, B,  C and D? 

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#Question id: 26792

#Unit 8. Inheritance Biology

If an F1 plant (Rr) is backcrossed to the parent with round seeds and wrinkled seed, what proportion of the progeny will have wrinkled seeds from both?