Answer:
2. The gene responsible for eye color is on the X chromosome.
Explanation:
<em>For X-linked genes, a male can either be affected or unaffected because the Y chromosome is hypothesized not to carry any gene. Females on the other hand can be a carrier, affected or unaffected because the two sex chromosomes carry genes.</em>
If eye color allele in drosophilia is represented by R, the cross between F1 red-eyed heterozygous female and red-eyed males can be illustrated below:
Red-eyed heterozygous female =
Red-eyed male =
x
Progeny:
Out of the 2 male progeny from the cross, 1 () is white-eyed while the remaining one () is red-eyed
Hence, the result shows that the gene for eye color in Drosophilia is X-linked.
Option 2 is the correct answer.
D because each progression in a natural pecking order or web is known as a trophic dimension. It alludes to the method of sustenance at that dimension.
For instance, a maker or autotroph is a creature equipped for changing over straightforward inorganic mixes into natural mixes like glucose that can be utilized by different life forms as sustenance. Green plants and green growth possess the maker level since they can utilize the vitality of the sun, in addition to carbon dioxide and water, to create glucose and oxygen.
The following trophic dimension is essential customer or herbivore. These are living beings that gain nourishment vitality by eating the makers. A precedent is a caterpillar devouring leaves or a rabbit benefiting from harvests.
The following trophic dimension is the optional shopper. This living being gains its sustenance vitality by eating the essential shopper. Since it expends substance it is viewed as a meat eater. A model is a feathered creature that eats the caterpillar or a fox that eats the rabbit.
There can be more elevated amount buyers at the end of the day, the dead living beings and the natural squanders from living life forms are separated by decomposers- - significant individuals from the evolved way of life. They return and reuse supplements back to the earth again and incorporate organisms and microorganisms.
Plant and animal cells are eukaryotic cells which have:
a cell membrane
cytoplasm
genetic material ( in the nucleus)
Bacterial cells are prokaryotic cells which have:
smaller structure (than eukaryotic cells)
cytoplasm
a cell wall
dna loop or small rings (plasmids)
hope this helps
"Cell Biology. the first stage of mitosis or meiosis in eukaryotic cell division, during which the nuclear envelope breaks down and strands of chromatin form into chromosomes." -From www.dictionary.com
Hope this helps! .+:。(ノ・ω・)ノ゙