Question

a certain species of grasshopper can have red stripes, yellow stripes, or red and yellow stripes.
an rr grasshopper has red stripes, a yy grasshopper has yellow stripes, and an ry grasshopper has red and yellow stripes.
which type of inheritance is this an example of?
incomplete dominance
codominance
sex - linked inheritance
recessive inheritance

Explanation:

To determine the inheritance type, we analyze each option:

• Incomplete dominance: Offspring shows a blend of parental traits (e.g., red + white = pink). Here, RY shows both red and yellow, not a blend.
• Codominance: Both alleles are expressed simultaneously in the heterozygote. The RY grasshopper has both red and yellow stripes, meaning both R and Y alleles are expressed.
• Sex - linked inheritance: Traits linked to sex chromosomes (X or Y). The problem has no mention of sex chromosomes.
• Recessive inheritance: Traits are expressed when two recessive alleles are present. Here, R and Y are not showing recessive - like expression (RY shows both traits, not a masked trait).

So the correct inheritance type is codominance.

Answer:

B. codominance