First start with the female's chromosomes (pictured in the left image below). When crossing over occurs, a section of the chromatids from two different homologs exchange places. For the female viper fish, this means that her chromosomes will have different alleles of the traits linked on the same chromatid. The new configuration is pictured to the right in the images below.

Remember that the genes are still linked and that they will not sort independently during meiosis.

Now return to the question page and select the correct answers.

OK, we know what gametes the female produces after crossing over (LE, Le, lE, le) and the male produces all the same gametes (Le). So, you just need to perform a punnett square to determine the genotypes and phenotypes of the offspring. Fill in the square below with how you think it should look. It does not matter which of the parents' gametes are placed across the top and which down the side.

Your punnett square should look similar to the one below. If it does not, review the material on gamete formation and how to set up the punnett square and try again.

	LE	Le	lE	le
Le	LLEe	LLee	LlEe	llee
Le	LLEe	LLee	LlEe	llee

Now return to the question page and select the correct answers.