In snapdragons tallness (T) is dominant to dwarfness (t) while red flower color is due to gene (R) and white to its alleles (r). The heterozygous condition results in pink (Rr) flower color. A draft red snapdragon is crossed with a plant homozygous for tallness and white flowers. What percentage of the offspring can be excepted to have the tall, pink-flowered phenotype

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.