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Alekssandra [29.7K]
3 years ago
5

What is tissue rejection?

Biology
1 answer:
dimaraw [331]3 years ago
4 0

Answer: Failure of transplantation that occurs when an organism recognizes transplanted tissue as foreign, and mounts an immune response.

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Suppose the two possible alleles for the height gene are tall and short. If short is recessive to tall, provide the symbol repre
navik [9.2K]

Phenotype - short , Tall

Genotype - tt (short) , TT or Tt (tall)

<u>Explanation:</u>

In Mendelian Genetics, <em>Dominant traits</em> are represented by capital letters and <em>Recessive traits</em> are represented by small letters.

So if height is the character considered, then the traits would be short and tall.

Tall is the dominant phenotype and short is the recessive phenotype.

The alleles of the gene for height are T and t.

The genotype for Tall trait is TT or Tt.

The genotype for short trait is tt.

Therefore, the symbol representation of phenotype (Tall) is TT or Tt and for phenotype (short) is tt.

5 0
3 years ago
How does evolution explain why theire are different species on Earth?
dalvyx [7]

Answer:

Evolution provides evidence as to how animals such as birds are related to much older animals. Over time, species evolve and adapt to their surroundings to suit their habitat. Thus many different species pop up. This all doesn't happen in the blink of an eye, though.

4 0
2 years ago
Describe the evidence scientists discovered which demonstrate the evolution of whales from land-based mammals to water-based mam
Bumek [7]

Answer: We have found fossils that share specific bony traits that are found only in all whales but absent in every other mammal group, indicating descent from a shared common ancestor with modern whales, and these fossils had legs fully adapted for walking on land, and fundamentally identical to those of older mammals that precede the shared common ancestor that these mammals share with whales.

This tells us that the shared common ancestor of whales and these mammals with legs almost certainly had legs themselves, and inherited those legs from their own older mammal ancestors.

Therefore, whales have ancestors in their lineage that walked on land with legs.

(We also have multiple fossils of ancient whales that had legs transitional in form between fully terrestrial walking legs and flippers adapted for swimming, and modern whales still possess a remnant hip bone buried deep in their bodies.)

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2 years ago
Where does spermatogenesis take place?
EleoNora [17]
Spermatogenesis take place in the female egg.
7 0
3 years ago
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If an f1 plant is backcrossed to one of the pure-breeding parental plants, what is the expected ratio of phenotypes among progen
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C. F1 generation is all Yy (let Y be yellow and y be green). Y is dominant to y. The F2 could be YY, Yy, Yy, or yy.        3:1
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3 years ago
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