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Morgarella [4.7K]
3 years ago
8

What is the material inside the nucleus? Why is it important?

Biology
1 answer:
VARVARA [1.3K]3 years ago
8 0
DNA. DNA holds the instructions for how the cell should work.
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In labrador retrievers, a common breed of dog, black coat is dominant to chocolate, normal vision is dominant to progressive ret
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The data given regarding the alleles are as follows
black(B)-dominant , chocolate(b) - recessive
normal vision - dominant, progressive retinal atrophy - recessive 
normal hip joint - dominant, hip dysplasia - recessive 

lets first consider one trait 
parents are heterozygous 
when crossed            Bb         x          Bb
offspring               BB      Bb     Bb     bb
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the probability of dogs being black - 3/4
                           dogs being chocolate - 1/4
likewise for the other two traits 
probability of normal vision - 3/4 and retinal atrophy - 1/4
probability of normal hip joint - 3/4 and hip dysplasia - 1/4

we have to calculate the probability of 1st pup being born is
chocolate - 1/4 
normal vision - 3/4
normal hip - 3/4
since all these traits should be acquired the probability of having the above three traits is calculated by getting the product of individual probabilities 
therefore answer is 1/4 x 3/4 x 3/4
  probability              = 9/64
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