What is an important characteristic of the plant cell wall?

An autosomal recessive disease has an incidence of 1/10,000. What is the approximate frequency of heterozygote carriers for this

goblinko [34]

Answer:

Option B

Explanation:

Given

Number of incidences or frequency of an autosomal recessive disease $= \frac{1}{10000}$

As per Hardy Weinberg's equation, frequency of a recessive genotype is $q^{2}$

$q = \sqrt{\frac{1}{10000} }\\ q = \frac{1}{100}$

As per first equation of Hardy Weinberg's -

$p+q=1$

so ,

$p = 1-q\\p = 1-\frac{1}{100}\\p = \frac{99}{100}$

$p^2 = (\frac{99}{100})^2\\p^2 =\frac{9801}{1000}$

As per second equation of Hardy Weinberg's -

$p^{2} + q^{2} + 2pq=1$

Substituting the given values in above equation, we get -

$\frac{9801}{10000} + \frac{1}{100} + 2pq=1\\2pq = 1-(\frac{9801}{10000} + \frac{1}{100})\\2pq = 0.99%\\OR[tex]2pq=1$ %

$2pq = \frac{1}{100}$

Hence, option B is correct.

8 0

3 years ago

Why are nutrients and gases most evenly distributed in a lake in the winter?

kvv77 [185]

When the temperature reaches 0˚C (32˚F), the top layer of the lake freezes and turns into ice. In solid form, water molecules are less dense and thus ice floats on the top of the lake.

This solid barrier prevents any wind-induced mixing as well as protects the relatively warm water underneath. Furthermore, light is also blocked so that photosynthesis is inhibited during this period. As the lake water is separated from the atmosphere, no direct oxygen diffusion occurs.

All these factors together causes a more even distribution of nutrients and gases in a lake in winter.

3 0

4 years ago

A woman has just become pregnant. which hormone below has contributed most directly to her pregnancy

Nastasia [14]

<span>The answer is progesterone. This hormone is important in maintaining pregnancy. It is produced by the ovaries (</span>corpus luteum<span>) in the early stages of pregnancy before the placenta takes over. Progesterone ensures the walls of the uterine remain thickened hence prepare for implantation</span>

5 0

3 years ago

Match each even to its description

romanna [79]

Answer:

Explanation:

The first one is Full Moon

The second one is New Moon

The third one is Lunar Eclipse

The last one is Solar Eclipse

8 0

3 years ago

What are the components of DNA nucleotides?

laila [671]

Answer:

In turn, each nucleotide is itself made up of three primary components: a nitrogen-containing region known as a nitrogenous base, a carbon-based sugar molecule called deoxyribose, and a phosphorus-containing region known as a phosphate group attached to the sugar molecule

Explanation:

pls mark me brainless.pls

7 0

3 years ago

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