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cestrela7 [59]
3 years ago
13

Earth was formed approximately 4.6 billion years ago. true false

Biology
1 answer:
GaryK [48]3 years ago
5 0
That is a true question

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That enhances the sensitivity of cancerous tumor cells toward the applied radiation dose.

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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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2 years ago
Why can a female only pass on an X chromosome to offspring
shusha [124]

Answer:

Why can a female only pass on an X chromosome to offspring?

It is an established fact that female has XX chromosomes while male has XY chromosomes, during fertilization both male and female donate one of the pairs to form a pair of allele for the offspring. The female donate an X chromosome since the two chromosomes in her possession is XX while the male donate either of the X or Y chromosome

Explanation:

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