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3 years ago

4. From the results of the first experiment, what can you say about the effect of molecular size

2 answers:

4 0

Mass of the molecules diffusing: Heavier molecules move more slowly therefore they diffuse more slowly. The reverse is true for lighter molecules. Temperature Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion.

IgorC [24]3 years ago

3 0

Answer:.

Explanation:

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The pedigree below tracks the presence of dimples through a family's generation. Having dimples is an autosomal dominant trait.

yulyashka [42]

A pedigree is a representation of a family history tracking a trait. The graph shows the inheritance pattern of the trait and its expression through several generations.

<h3>What is an autosomal dominant trait?</h3>

The autosomal dominant trait is the characteristic that is coded by a gene located in an autosomal chromosome (this is, not a sexual chromosome).

This trait is dominant because it is coded by the dominant allele, meaning that the recessive allele codes for the absence of dimples. The presence of only one dominant allele in the genotype is enough for the idividual to express dimples.

<u> Genotype Phenotype </u>

DD, Homozygous dominant Dimples

Dd, Heterozygous Dimples

dd, Homozygous recessive No Dimples

<h3>What is a pedigree?</h3>

The pedigree is the representation of a family history conserning a certain trait. In this case, dimples.

The pedigree shows the expression -and inheritance pattern- of the trait through several generations.

To correctly interpret a pedigree, we need to know that

Family members

→ Individuals are represented with geometrical figures.

→ Males are squares

→ Females are circles

Trait/Phenotype

→ Healthy/normal/not affected individuals are represented with empty figures

→ Affected/mutated individuals are represented with solid black figures

Generations

→ Each file is represented with a roman number, indicating the Generation.

Here we will assume that

Individuals represented with solid figures express dimples -shaded individuals-. They can be either DD or Dd. This is because dimples is not usuall.

Individuals with no dimples are represented with empty figures and are dd.

According to the provided pedigree,

I-1 ⇒ man DD or Dd

I-2 ⇒ woman dd

II-1 ⇒ man Dd or DD

II-2 ⇒ woman dd

II - 5 ⇒ woman dd

III - 1 ⇒ man Dd

III- 2 ⇒ woman dd

III - 6 ⇒ woman dd

Since this pedigree does not specify the relationship between individuals, I can not answer the question based on it. So, I will attach another tree to specify genotypes.

I advise you study this new example, and then follow the same reasoning to choose the correct individual according to you pedigree.

Yo can learn more about pedigrees at

brainly.com/question/19516649

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7 0

2 years ago

What process restores the 2N chromosome number in a zygote's somatic cells for growth and development to continue?

miv72 [106K]

The answer to the question stated above is fertilization.
<span>
Fertilization </span><span>restores the 2N chromosome number in a zygote's somatic cells for growth and development to continue.
></span>Fertilization<span> is the fusion of gametes to initiate the development of a new organism.</span>

6 0

4 years ago

An island frog population is made up of two color phenotypes, green and brown, caused by different coloration alleles.The freque

butalik [34]

In this case, brown frogs increase and green frogs decrease, whereas natural selection would cause this change in allele frequency.

<h3>What is natural selection?</h3>

Natural selection is the main evolutionary force by which populations change (evolve) across time.

Natural selection leads to the change in the allele frequencies depending on the more adapted phenotypes in a given environment.

In conclusion, brown frogs increase and green frogs decrease, whereas Natural selection would cause this change in allele frequency.

Learn more about natural selection here:

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