Autosomal dominant condition occurs when alleles of genes present on chromosomes in the autosomes (somatic) mask the effect of the other allele.
They can produce a light brown kid and the chances of producing this is 50%.
Let light brown be (BB or Bb) Â and black be (bb)
Parents :          B b   x    b b
Offspring genotype:    Bb    bb
Ratio: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1 Â Â : Â Â 1 Â (50%)
Learn more about autosomal dominance: https://brainly.com/question/7135379