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PSYCHO15rus [73]
3 years ago
14

Could natural selection work in a trait that is not heritable? Explain

Biology
2 answers:
miss Akunina [59]3 years ago
6 0
Hdbdjdjbrndhdjdhbhdjdjr hehehaha
alexdok [17]3 years ago
3 0

Answer:

I dont think so as if a trait that is not inheritable would most likely would be seen in nature unless another animal uses it again

Explanation:

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If realigns the domains of weaker magnet 
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What are the major reservoirs for water?
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Those would be oceans and lakes. Hope this helps and have a nice day!
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A couple planning their family are aware that through the past three generations on the husband's side a substantial number of s
Nesterboy [21]

Answer:

a) There are lots of genes on chromosome 1 could be affected, and the gametes could be imbalanced (missing segments of DNA or whole chromosomes)

b) Roughly 50%

c) No. I would advise that the couple undergo preimplantation genetic diagnosis, so that a zygote carrying the normal copy of chromosome 1 could be selected.

Explanation:

Chromosome 1 is one of the largest and most gene rich chromosomes. An inversion that covers 70% of its length would cover lots of genes.

While an inversion on its own would not seem problematic (as all the genes on the chromosome are still there), when it comes to meiosis, the sister chromatids would not be able to correctly align, and crossing over would further complicate this. It could also lead to unbalanced gametes missing entire parts of the chromosome. Therefore, there are likely numerous genes that will be affected and messed up by the inversion.

This could explain the high incidence of past still births, as if lots of genes are affected, and non-functional, the pregnancy would be rendered non-viable, or highly deleterious causing premature death.

b) There is a 50% chance of a child inheriting the defective copy of chromosome 1 (and 50% of a chance of them inheriting the normal chromosome 1. Therefore, there is likely a 50% chance that future offspring would be affected by defects

c) No. I would advise that the couple undergo preimplantation genetic diagnosis. In this, the couple undergoes in vitro fertilization (IVF). When embryos are produced through IVF, they can then be tested for the presence of the abnormal chromosome. Embryos will only be implanted into the mother if the normal chromosome 1 is present.

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3 years ago
Read the excerpt from the poem “Goliath of Gath” by Phillis Wheatley below.
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The sword-billed hummingbird has the longest bill of all birds compared to its body size. Its beak is perfect for drinking necta
iris [78.8K]

This is an example of co-evolution.  

<u>Explanation:</u>

In co-evolution one species or a number of species evolve according to the changes in another species. Here the evolution of the beak of humming bird according to the shape of Ossifloramixta flower is an example of co-evolution. Co-evolution is common in the nature.  

Bees, insects and butterflies commonly co evolve with the flower plants and  vice versa. Co-evolution is of two types. The first type is specific co – evolution where only two parties are involved in co-evolution. In the second type of co-evolution namely diffused co-evolution many species evolve in response to specific traits in a species.

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