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3 years ago

Mot nucleoxom co cau truc gom

Biology

2 answers:

sukhopar [10]3 years ago

7 0

Sorry i didn’t understand
Sorry

Klio2033 [76]3 years ago

7 0

Mỗi nucleosome gồm một đoạn DNA quấn xung quanh một lõi có phức hợp tám phân tử histôn gọi là octamer

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Photosynthesis Puzzle #3

Radda [10]

Answer:

They all have cholorophyll

Explanation:

Or we can say they carry out photodynthesis and make food.

See, all the pictures are green, this green pigment (colour ) is cholorophyll.

The first, second and fourth are pictures of leaves [which makes food] and the third picture is a illustration of the mitochondria.

Hope it helps!

8 0

3 years ago

Read 2 more answers

Evolution can be guided by random processes. What is the effect called when some genotypes are lost in a small population over t

soldi70 [24.7K]

Answer:

Genetic drift

Explanation:

Genetic drift is defined as the random change in allelic frequencies from one generation to the other.

Genetic drift is an evolutionary mechanism in which the allelic frequencies in a population change through many generations. Its effects are harder in a small-sized population, meaning that this effect is inversely proportional to the population size. Genetic drift results in some alleles loss, even those that are beneficial for the population, and the fixation of some other alleles by an increase in their frequencies. The final consequence is to randomly fixate one of the alleles. Low-frequency alleles are the most likely to be lost. Genetic drift results in a loss of genetic variability within a population.

Genetic drift has important effects on a population when this last one reduces its size dramatically because of a disaster -bottleneck effect- or because of a population split -founder effect-.

5 0

3 years ago

A major feature of the mediterranean diet is liberal intake of

fiasKO [112]

The answer to this question would be: Olive oil

In Mediterranean diet, you need to exchange the butter (since it contains unhealthy fat) with olive oil or canola oil. Saturated fat is also unhealthy so you need to exchange it. Lean meat is good but the consumption must be limited.

3 0

3 years ago

the couple is also concerned about their child inheriting hemophilia, another rare disease, which is x-linked. natalie’s brother

IgorC [24]

Hemophilia is a recessive X-linked condition and is inherited from parents. . The probability that Natalie and Daniel’s first child has hemophilia is 1/4, not 1/8. The statement is false.

<h3>What is an X-linked gene?</h3>

When talking about sex-linked genes, we refer to all those genes located in one of the sex-chromosomes and not in the somatic ones.

X-linked genes are the genes located specifically in the X sex chromosome.

Traits coded by these genes are inherited. This is, X-linked genes are transmitted from parents to children through generations.

According to this, X-linked genetic disorders will be inherited as well.

Men have a high probability of being affected since they only have one copy of the X chromosome.

In women, the effect of the mutation might be musk in heterozygous state if the mutation is recessive.

Hemophilia is a recessive X-linked disorder, which means it is coded by the recessive allele.

X+ ⇒ X chrosomosome with Dominant allele

X- ⇒ X chrosomosome with Recessive allele

Genotype Phenotype

X+X+ Healthy woman

X+X- Healthy carrier woman

X-X- Hemophilic woman

X+Y Healthy man

X-Y Hemophilic man

Let us make a pedigree of these families,

Natalie's family:

Mother healthy carrier X+X-

Father healthy X+Y

Brother hemophilic X-Y

Natalie Healthy X+X- or X+X+

Natalie has 1/2 chances of being carrier X+X- and 1/2 of being X+X+.

Daniel's family:

Mother healthy carrier X+X-

Father hemophilic X-Y

Sister hemophilic X-X-

Daniel Healthy X+Y

He has 1/2 chances of being healthy X+Y and 1/2 of being affected X-Y.

According to the product probability rule, if events A and B are independent from each other, the probability of occurrence of both events together is

P(A∩B) = P(A) x P(B)

In this case,