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Amanda [17]
3 years ago
7

The ________ test is performed by introducing dilute solutions of allergens into the skin of the inner forearm or upper back wit

h a fine-gauge needle.
Biology
1 answer:
Ratling [72]3 years ago
4 0
The test is bad and very hard I suggested not doing any if the work because I give up
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A woman who is a carrier for colour blindness (X-linked recessive) has children with a man who has normal colour vision. A. What
viva [34]

Answer:

Explanation:

The Genotype of the  woman is XCbXN

The man XNY

Since the allele for the color blindness is carried on one of the X -chromosomes of the  carrier mother, then  the male children will be color blind or carrier deopending on the defective gene they inherited. Since they will receive the defective or normal  allele from the  mothers,but the female will carriers or normal because they will inherit either defective allele or normal allele from the mother,but normal  X allele from the father.

Assuming the colorbind gene was inherited by One of the boys, and the girls take the defective genes

1. XNY vs XCbXN.Then the one of the  boys will be colorblind  and the one of  girls will be carriers. XNXCb, XNXN, XCbY,XNY  50 %

2.If the two boys take the effective genes from the mothers. and none of the girls take the defective alelle

Then the two boys will be colorblind and the girls will be carrries XcbY,XcbY and XNXN XNXN.(normal girls).

The proportions that will be  the females  since the girls can only take the defective allele from one of the normal and defective allele from the mother. Assuming the girls  take the defective allele from the mothers and take normal from the father,they will all  be carriers,since the X of the father is normal.

They can not have a color blind girl.Since the father is normal It takes two colorblind X-chromosome to give a girl.

5 0
3 years ago
1.) What organism is essential for the nitrogen cycle to continue?
yaroslaw [1]

im not even sure tbh these are really hard im so sorry

8 0
2 years ago
Cual es la importancia de la genética y la herencia, desde el punto de vista científico y social?
LekaFEV [45]

Answer:

La genética ayuda a explicar: Lo que nos hace únicos. Por qué los miembros de la familia tienen rasgos en común. Por qué algunas enfermedades, como la diabetes o el cáncer, vienen de familia, La genética médica es una especialidad médica que trata con el diagnóstico y manejo de las enfermedades hereditarias. La finalidad de esta especialidad es brindar una medicina personalizada al paciente y por ende en algunos casos, tratamientos personalizados,los científicos pueden hacer ciertas combinaciones entre genes de diferentes especies, para así solucionar problemas y mejorar el rendimiento económico-comercial de las explotaciones. Se pueden buscar curas a enfermedades genéticas para que las nuevas generaciones nazcan más sanas.

8 0
2 years ago
A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down me
LekaFEV [45]

Answer:

It will take 63 years

In 189 years, one-eight of the sample will be left

By multiplying the number of half-life cycles

Explanation:

I just completed this assignment.

3 0
3 years ago
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The nervous system and the muscle system responds to stimuli to produce motion. The movements of
evablogger [386]

Answer:

skeletal

Explanation:

skeletal bones are involuntary

4 0
3 years ago
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