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Vadim26 [7]
3 years ago
7

In a cross of purple flowered heterozygous plants (Pp), the letter P represents the allele for purple flowers and the letter p r

epresents the allele for white flowers.
What is the probability that an offspring of this cross expresses plants with purple flower phenotypes?

A. 0
B. 1/4
C. 1/2
D. 3/4
Biology
1 answer:
sesenic [268]3 years ago
6 0

Answer:

D. 3/4

Explanation:

I took the test and got it right.

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Answer:

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It is given that out of the 4 nucleotides A, T, C & G each one has equal probability to occur at any position on the DNA molecule which simply means that the probability of occurrence of any nucleotide at a position is 1/4.

Also, it is given that probability of occurrence of either A or T at 3rd position is equal which means that the probability at that particular position will be 2/4 = 1/2.

Now, GA(A/T)TC is the DNA sequence where Restriction enzyme HinfI cleaves so the total probability of an average HinfI cleavage fragment will be = 1/4 x 1/4 x 1/2 x 1/4 x 1/4 = 0.00195 = 0.2 i.e. 2 kb.

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