Determine the genotypes of the parents if the father is blood type A the mother is blood type B the daughter is blood type O one son is blood type AB and other son is blood type B

The genotypes of father will be iA i

and of mother will be iB i

Explanation:

CASE I: If father's genotype  is iA iA

           and mother's genotype is iB iB

This case is not possible because daughter has 'O' blood group.

CASE II: If father's genotype is iA iA or iA i

          and mother's genotype is iB i or iB iB

This is also not possible because 'O' blood group will not appear in any crossing.

CASE III: If father's genotype is iA i

          and mother's genotype is iB i

in this case both 'AB' and 'O' blood group is possible.

hence, father's genotype is iA i

and mother's genotype is iB i.

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.