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AfilCa [17]
3 years ago
5

How would the genetic traits of a population change in response to an environmental pressure such as overfishing?

Biology
1 answer:
Aleks [24]3 years ago
3 0
Overfishing can<span> be defined as the catching of more fish from a single </span>population<span> ... Some commercially important stocks are in </span>such<span> a critical state that all fishing has .... than protecting the marine </span>environment<span> and conserving fish </span>populations<span>. .... Heavy fishing </span>pressures can change<span> the </span>genetic characteristics of a population<span>:.</span>
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A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the recessive alleles are abc. She is cr
telo118 [61]

Answer:

<h2>(14+16)/1000 *100= 3</h2>

Explanation:

Parental combinations are always more common then other recombinant progenies.

A female fly is heterozygous for three X-linked genes crossed with an abc/Y male. . If single crossover occurs between a & b  and between b & c, then the double cross is that, which occurs in both.

Double cross over progeny are always least in number, so here double cross occurs are in abC 14 and ABc 16.

So we are expecting that number of double cross over progeny= (14+16)/1000 *100= 3

8 0
2 years ago
In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals
Masja [62]

Answer:

The correct answer is - operation of reflex arc.

Explanation:

The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.

Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.

In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.

Thus, the correct answer is - operation of reflex arc.

8 0
3 years ago
Which is the greatest carbon reservoir?<br> A. Geosphere B. Hydrosphere C. Atmosphere D. Biosphere
Dimas [21]

Answer:

Atmosphere

Explanation:

4 0
3 years ago
Porque los alimentos se oscurecen?(platanos, palta, manzana, papa, etc) respondan pls✋
inn [45]

Answer:

Una enzima es una sustancia, generalmente una proteína, en la célula de un organismo que acelera las reacciones químicas.

Durante el pardeamiento enzimático, una enzima llamada fenolasa y otro compuesto orgánico que se encuentra en las células de la fruta llamados fenoles pasan por una reacción de oxidación cuando se exponen al oxígeno. La fenolasa regula la reacción, convirtiendo los fenoles en melanina.

Por lo general, las enzimas de la fruta están encerradas en tejido. Las enzimas están metidas en sus células, trabajando para madurar la fruta. Pero cuando esas células se descomponen, ya sea por una causa externa como si alguien muerde o corta la fruta o por causas naturales como el envejecimiento, las enzimas se liberan y entran en contacto con el oxígeno, lo que desencadena la reacción química y hace que la fruta se vuelva marrón.

5 0
3 years ago
A person with a phenotype of HbSS has sickle cell disease. A person with a phenotype of HbAS allele carries the sickle cell trai
makkiz [27]

The right answer is 1/4.

Two carriers of the disease each have a chance in two to transmit their sick gene ie: 1/2 * 1/2 = 1/4

A genetic disease is said to be autosomal recessive when

The gene involved is carried by an autosome (non-sex chromosome, X or Y in XY system of sexual determination);

The associated phenotype of this trait is recessive (the presence of two identical alleles is essential for the character to be expressed).

One of the two alleles is transmitted by the male gamete, the other by the female gamete.

But being a carrier of the mutation does not necessarily mean being sick, the manifestations of a genetic disease depend on its penetrance and the variability of its expression.

3 0
3 years ago
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