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3 years ago

Tetracycline is rarely used in pregnant and very young patients because it can:

2 answers:

7 0

Hello!

Tetracycline shouldn't be used in younger patients because of its effects on their teeth and bones.

In teeth, the drugs interfere with enamel development may cause a permanant yellow or gray or brown discolouration. In bone, the drugs form a stable compound in bone-forming tissue and may interfere with bone growth.

It may also harm a fetus under two months of pregnancy because of systemic sulfonamides.

I really hope this helped you out! :)

BlackZzzverrR [31]3 years ago

6 0

Systemic sulfonamides are contraindicated during late pregnancy, lactation, and in ... ARF is rarely associated with newer sulfonamides, which are more soluble ... is the drug of choice because it can be given to patients with renal impairment, ...

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Two autosomal genes, J and K, are 60 map units apart. You perform the following testcross: J K / j k x j k / j k. At what freque

Dmitry [639]

Answer:

J K / j k = 20%

j k / j k = 20%

J k / j k = 30%

j K / j k = 30%

Explanation:

To calculate the recombination frequency, we have to know that 1% of recombinations = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

The map unit is the distance between the pair of genes for which every 100 meiotic products, one of them results in a recombinant one.

So, en the exposed example:

J and K are autosomal genes

J and K are separated by 60 M.U.

60 M.U. means that there is 60% of recombination.

Cross) J K / j k x j k / j k

Gametes) JK Parental jk, jk, jk, jk

jk Parental

Jk Recombinant

jK Recombinant

One map unit equals 1% of recombination frequency. This means that every 100 meiotic products, one of them is a recombinant one.

1 M.U. -------------- 1% recombination

60 M.U. ------------ 60% recombination

30% Jk + 30% jK

100 M.U. - 60 M.U. = 40 M.U.

40M.U.--------------40 % Parental (Not recombinant)

20% JK + 20% jk

Punnet Square) JK jk Jk jK

jk JK/jk jk/jk Jk/jk jK/jk

J K / j k = 20%

j k / j k = 20%

J k / j k = 30%

j K / j k = 30%

3 0

3 years ago

Humans can use many methods to reduce their impact on the environment. Match each method below with an example.

ipn [44]

1. A logging company plants two acres of land with

trees for every one acre of forest it removes -B. using resources sustainably-

2. Julia uses old glass jam jars as pots for

her plants-C. recycling resources-

3. Jackson installs a solar-powered water heater

to supply his house with hot water-A. using renewable resources-

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3 years ago

Read 2 more answers

Heterozygote advantage refers to the tendency for heterozygous individuals to have better fitness than homozygous individuals. T

ddd [48]

Answer:

False

Explanation:

Genetic variation is the difference in the sequence of DNA in the individuals of a population and a heterozygote has more genetic variation that homozygote person because heterozygote has two different alleles of a gene while homozygous individual have two same alleles.

Heterozygotes have advantage over homozygotes because it protects the individual from many genetical diseases and increase the genetic variation by increasing the gene pool in the population. So higher fitness results in more genetic variation in the population therefore the statement is false.

4 0

3 years ago

Describe the passage of a meal containing bread through your digestive system

Alex777 [14]

Before your food passes from the mouth and down your esophagus, salivary amylase, an enzyme in saliva, begins to digest the starch in your bread. That is the start of chemical digestion. ... The passage of the bolus through the esophagus to the stomach occurs by peristalsis, a series of wave-like muscle contractions.

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3 years ago

What is the structure of nucleus

babunello [35]

The structure of the nucleus is that it has the protons (+) and the neutrons (0).

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3 years ago