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2 years ago

Which of the following affects an entire chromosome, not just a gene or base pair?

Biology

1 answer:

Hitman42 [59]2 years ago

8 0

Answer:

A gene

Explanation:

base pairs can differ

but when gene is changed, chromosome is affected

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The reason why a dichotomous key to identify organism is valuable, is because it helps you classify organisms,it helps you identify eco -systems, it helps you analyze an organism's traits.

Explanation:

A dichotomous key is a skill that has been brought about by scientists, to help people to identify and classify organisms.

In Dichotomous key, the main way of identifying an object is by it scientific name.This is because, though two objects might look similar to each other but they might belong to a whole different species.

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This key is very useful to people who are novice, and don't know much about identifying an organism.

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3 years ago

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Basalt is a gray or black igneous rock. Pilar uses an absolute dating method to study a sample of basalt. What will the method h

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3 years ago

What is one way phytoplankton contribute positively to the ecosystem?

Nezavi [6.7K]

Phytoplankton contribute positively in the oceanic ecosystem as they are a source of food for oceanic animals. Moreover, they remove carbondioxide from the carbon cycle and utilize it for the process of photosynthesis.

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3 years ago

What is one method or line of reasoning that scientists could NOT use when testing the hypothesis that dolphins and Ichthyosaurs

liraira [26]

Answer:

They cannot use the reasoning, "Dolphins and Ichthyosaurs form a paraphyletic group."

Explanation:

This is because they always form a monophyletic goup. Both of the species have specific morphological similarities that are enough to consider them in monophyletic group instead of a divergent paraphyletic.

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3 years ago

A researcher had 15 purebred wikl mice which were brown and all females, they were all mated with a male called Bob, All offspri

cestrela7 [59]

Complete question:

A researcher had 15 pure-bred wild mice which were brown and all were females. They were all mated with a male called Bob. All the offspring were brown. These were then crossed among themselves with the following results: 293 brown and 115 white.

(i). Determine the color of Bob.

(ii). Determine which color is dominant.

(iii). Work out the ratio of brown to white in the ‘grandchildren.’

(iv). If the researcher crosses two of the white 'grandchildren', determine the color of their offspring.

Use the Punnett square to work out your answers

Answer:

(i). Determine the color of Bob. BOB IS WHITE

(ii). Determine which color is dominant. BROWN IS DOMINANT

(iii). Work out the ratio of brown to white in the ‘grandchildren.’

PHENOTYPIC RATIO BROWN TO WHITE 3:1

(iv). If the researcher crosses two of the white 'grandchildren', determine the color of their offspring. THE WHOLE PROGENY WILL BE WHITE

Explanation:

Due to technical problems, you will find the complete question, answer, and explanation in the attached files.

Download pdf

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3 years ago