Answer:
genotype of both parents is uu.
Explanation:
All different type of genotypes (parent 1 and <em>parent 2</em>; <u>offspring</u>)
UU + <em>UU</em> = <u>UU</u>
UU + <em>Uu</em> = <u>Uu</u>
UU + <em>uu</em> = <u>Uu</u>
Uu + <em>UU</em> = <u>Uu</u>
Uu + <em>Uu</em> = <u>Uu</u>
Uu + <em>uu</em> = <u>Uu</u>
uu + <em>UU</em> = <u>Uu</u>
uu +<em> Uu</em> = <u>Uu</u>
uu + <em>uu</em> = <u>uu</u>