A pea plant that is known to be heterozygous for all three loci is crossed to an

Question

A pea plant that is known to be heterozygous for all three loci is crossed to an uniknown plant. The results of the and yellow is to green. tall round green 900 tall wrinked yellow 300 short round yellow 300 short round green 300 tall wrinkled green 300 8 100 What is the yellow short wrinkled green total 3200 of the nose is determined by tative loci. If one crosses a 19 inch nosed nose, one gets F1 offspring with 11 inch noses. When one crosses two F1 individuals, one gets an array of nose and 19 inch noses ooour about one in 256 offspring with one that has a 3 inch from 3 to 19 among the F2, three inch noses occur only about 1 in 256 offspring. How many loci are involved in forming this trait? 16. What is the contribution per allele for this trait (in inches/allele)? 17. Two 11 inch nosed F1 individuals 15 are arossed. How often will their progeny have noses 9 inches long? b. 1/256 The ABO blood group in humans is controlled by to H and Io, thus IAto gives type A blood and IPno gives type B blood. At locus also has multiple alleles, but these aleles can be classified into two types, positive and negative alleles are dominant over Rh- alleles. The alele frequencies of these loci are as follows 18. At what frequency will an 19. At what frequency will an 20. The rarest type of blood is type AB Rh negative. How many of these will be expected in 1000 21. Tyrosinemia is a recessive disease in which the liver fails to produce an es occurs in about 1 in 12,000 children born in the US. What is the frequency of heterozygotes for this disorder? 22. Assuming that a third of the tyrosinemia affected individuals can successfully undergo a liver transplant in this population be type "Or, Rh positive? d. 0.384 a. 0.210 b 0.0577 c 0.424 a, 0210 b. 0.0573 0.424 d. 0.386 e. 0.352 b. 10.2 a. 0.0083 b 0.00913 c 0.00083 d. 0.0181 e 0.003 w-an·what will be the frequency of the recessive alele after one generation of this selection? a. 0.00916 b. 0.00769 c 0.00937 d. 0.00898 e. 0.01778 23. The index finger of a human hand may be longer or shorter than the fourth finger. The In a villiage of 170 135 had were allowed to present in the next how many long index finger individuals would be a. 20128 b. 70/128 c119/128 d. 99/128 e none of these

Explanation / Answer

it is clearly follows a binomial distibution :nCx Px (1-P)1-X

let A= no of girls;

we know that probabilty of having girls or boy child=0.5=P

x=0,1,2,,3,4,5,6,7: n=7

P(A>=5)=1-P(A<5)

             =1-(P(A=1)+P(A=2)+P(A=3)+P(A=4))

            =1-49/64=15/64

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