Expected because it’s something that’s not caused by humans which therefore means its environmentally caused.
Metaphase. During this stage of mitosis, the chromosomes line up in the middle of the cell along the equator. Each chromosome attaches itself to a spindle fiber.
Answer:
Given that ebony bodies and normal bristles are recessive traits.
Parent 1: Pure breeding tan body and stubby bristles (AABB)
Parent 2: Pure breeding ebony body and normal bristles (aabb)
AABB X aabb = AaBb
Hence in F1 progeny entire offspring has tan body and stubby bristles
When AaBb X aabb, expected progeny would be :
AaBb
aaBb
Aabb
aabb
Since the different type of gametes are expected to form in same number, phenotypic ratio of this progeny would be 1:1:1:1
But as given, the offspring were not produced in this ratio. Flies with parental traits ( AABB and aabb ) were far more in number than flies with the recombinant traits ( aaBb and Aabb ). This phenomena is called as linkage. The genes for both the traits were linked so when the gametes were formed, they did not show independent assortment. Parental gametes were produced more in number resulting in more offspring with parental phenotype.
Nucleic acids bc they make up DNA and RNA
