Question

"In the P (parental) generation, a female fly with pink eyes and short antennae was crossed with a male fly having red eyes and long antennae. When two F1 individuals were crossed and a large number of F2 individuals were counted, there were NO F2 individuals with pink eyes and long antennae, and NO F2 individuals with red eyes and short antennae." This result contradicts which hypothesis?

Answer 1

Answer:

cross breeding

Explanation:

1. the gene of the f2 with red eyes was transferred to some particular offspring and those with pink eyes also and vice versa .example,
2. Py Py rY rY

Py (Py Py) (Py Py) (Py rY) (PyrY)

rY (PyrY) ( PyrY ) ( rYrY ) (rYrY )

Answer 2

This result contradicts the hypothesis of the occurrence of crossing over.

We can reach this result because:

• Crossing over is the phenomenon that causes the exchange of genetic material between homologous chromosomes.
• This exchange of genetic material causes a reformulation of allele pairs.
• This allows for greater genetic variability within the population allowing for a greater mix of alleles.

In the case of the flies shown in the question above, the occurrence of crossing over would allow the visualization of offspring with pink eyes and long antennae, or red eyes and short antennae. However, as crossing over did not happen, we can rule out this hypothesis.

More information:

https://brainly.com/question/18824252?referrer=searchResults