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OleMash [197]
3 years ago
7

In chickens, congenital baldness results from a Z-linked recessive gene. A bald rooster is mated with a normal hen. The Fi from

this corss are interbred to produce the F2.. The F2 progeny will include?
A. only normal roosters & hens

B. only bald roosters & hens

C. only normal roosters & bald hens

D. only bald roosters & normal hens

E. normal roosters & hens and bald roosters & hens
Biology
1 answer:
yanalaym [24]3 years ago
6 0

Answer:

<h2>E. normal roosters & hens and bald roosters & hens.</h2>

Explanation:

The sex chromosomes of the chickens are represented by ZZ for male chicken that is rooster and ZW for the female chicken that is hen.

In the given question, the genotype of the bald rooster is zz and the genotype of the normal hen is ZW.

So the F1 progeny are, Zz that is normal male and the zW that is bald female.

So F1 × F1

                        Zz × zW

Thus, F2 progeny are Zz ( normal rooster), zz ( bald rooster), ZW ( normal hen), zW ( bald hen).

             

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The nurse should arrange an immediate home visit with the visiting nurse service and the social worker.

Carrying for the person with dementia is not that simple, it’s even challenging and stressful. Frustration and stress may negatively impact on the health of the client. So, caregiver must be someone calm and stable. Because of that, a person with moderate intellectual disability might not be the most appropriate for this duty.

7 0
3 years ago
You are served dessert at a restaurant. You want to know what % of the calories in the dessert are from fat. The menu states tha
jasenka [17]

Answer:

39.82 %

Explanation:

Proteins and carbohydrates provide 4 calories per gram. On the other hand, fats provide 9 calories.

We can first calculate the calories of protein + carbohydrates:

       (30g + 4g) x 4 = 136 calories

And we must calculate the calories provided by fat:

        10g x 9 = 90 calories

Now to get the percentage we must see how many calories the dessert has in total:

          136 + 90 = 226 cal

This represents 100% of calories. And now we need to find out how much 90 calories are from the total.

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             90 cal ------> X

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4 0
3 years ago
Juvenile ____________________ arthritis is an autoimmune disorder that affects children with symptoms that include stiffness, pa
pickupchik [31]

Answer:

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Explanation:

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Juvenile rheumatoid Arthritis is an autoimmune disorder that affects children which means the body attacks itself by mistakenly identifying its own cells as foreign .

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7 0
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Answer:

chemicals

Explanation:

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Nose and tongue are two organs that possess a type of sensory receptor called CHEMORECEPTORS. Chemoreceptors are receptors that respond to chemical stimuli. In other words, the receptors in the nose and tongue are stimulated by chemical substances e.g. food chemicals for TONGUE, chemicals in air for NOSE.

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3 years ago
A wildlife biologist is investigating a sudden increase in the death rate
Ann [662]

Answer:

circulatory and respiratory

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The body system of Birds possesses a higher arrangement of organs to perform a particular function. The organs form a system which includes the organs and associated structures.

When the biologist observed the shortage of the dissolved oxygen and increase in the level of dissolved carbon dioxide, this could be the result of the failure of the circulatory system which supplies these gases on the body and the associated respiratory system which helps in the exchange of these gases with the atmosphere.

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