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2 years ago

In the phase of wound healing, collagen closes the gap between tissues and scar tissue forms

1 answer:

4 0

In the phase of the wound healing, collagen closes the gap between tissues, and scar tissue forms. This phase is called the Remodelling phase because collagen continues to increase, and the tissue begins to contract with the help of fibroblasts, which adds strength to the new tissue. However, gradually excessive collagen in the fibrin framework can cause scar tissue formation.

Therefore, at the injury site, the fibrin in blood stops the blood flow and provides mechanical support to the collagens, a protein that helps close the gap between injured tissues and gives strength to the newly formed tissue. This phase continues for six or more months. That is the reason it is called the remodelling phase.

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In a one-trait testcross, the phenotype that disappears in the f1 generation of a homozygous dominant and homozygous recessive c

Alexxandr [17]

The answer is recessive

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3 years ago

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(c) Based on the data in Table 1, describe why the dominant alleles for body color and wing shape are the alleles that produce a

Brrunno [24]

Answer:

Check the explanation

Explanation:

Consider the below table of F2 data of phenotypic flies: we can reconstruct the table as seen in the second attached image below:

From the above observations it is clear the Gray body long wings and Ebony body vestigial wings are the parental combinations and that the Gray body vestigial wings and Ebony body long wings are the recombinants.

Also the ratio indicates that Gray body is dominant over ebony body and that long wings is dominant over vestigial wings.

here the genes for the two characters have shown independent assortment which means that the genes are unlinked if located on the same chromosome or are located on different chromosomes.

Now F1 hybrid= GgLl (G for Grey and L for Long)

Cross between F1 hybrid and true breeding Gray vestigial (GGll)

GgLl x GG ll

Gametes-----------> GL Gl gL gl Gl

GL Gl gL gl

Gl GGLl GGll GgLl Ggll

(Gray long) (Gray vestigial) (gray Long) (Gray vestigial)

Therefore the probability of getting the flies with gray body vestigial wings= 2/4= 50%

b) The reason why the students obtained the above given F2 results involving a cross between true breeding Gray body and long wings with true breeding Ebony body and vestigial wings is that the genes for the two charcters asssort independently in F2 generation and that the genes are not linked as:

Parents------------------> GGLL x ggll

Gametes -----------------> GL gl

F1---------------------> GgLl (Gray long but in heterozous condition)

Now GgLl x GgLl

Gametes GL Gl gL gl GL Gl gL gl

Here gametes assorted independently and hence in F2 generation we got the above results (U can show the results in the form of punnett square.

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3 years ago

Serratia marcescens cells produce a red pigment at room temperature. The red color of the colonies is an example of which of the

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Answer:

The red color of the colonies is an example of <u>a phenotype .</u>

Explanation:

Serratia marcescens -

They are the species ,that are , gram - negative bacteria , rod - shaped ,

they are from the family of Enterobacteriaceae .

Serratia marcescens are mostly found in the urinary and respiratory tracts of the hospitalized adults and in children , in the gastrointestinal systems .

S. Mercescens are most commonly found in the environment , growing the bathroom and dirt .

It is gram-negative, produces a reddish - orange tripyrrole pigment called the prodigiosin , is an example of phenotype .

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3 years ago

What does a centromere hold together?

Rudiy27

Answer:

Structure in a chromosome that holds together the two chromatids

Explanation:

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Invasive species can impact ecosystems by...

balu736 [363]

Answer:

D: All of these

Explanation:

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