09) na mandioca existem dois pares de genes situados em dois pares de cromossomos diferentes, que atuam respectivamente sobre a cor da raiz e a largura dos folíolos. as relações de dominância para os fenótipos e genótipos são as que se seguem:

faça o cruzamento entre os indivíduos indicados e verifique a descendência:

a) marron(homozigoto) estreito (heterozigoto) x branco e estreito (heterozigoto)

b) marron(homozigoto) largo x branco e largo

[Incomplete question. I found these data in other source]

Brown: BB and Bb

White: bb

Narrow: LL and Ll

Long: ll

This means that long is recessive and narrow is dominant, and also brown is dominant and white is recessive.

root color -> Alleles: narrow (L) and long(l)

leaflets length -> Alleles: brown (B) and white (b)

a) A brown (homozygous) narrow (heterozygous) mandioca is BBLl, so it can produce BL or Bl gametes

A white mandioca is always homocygous, so a white narrow (heterozygous) mandioca is bbLl - this means it can produce bL and bl gametes.

the correct answer is c   with the systems

the answer is sex-linked recessive.