Answer:
i think it is d. sorry if its wrong
Answer:
DNA or protein can be used as a ''molecular clock'' that tells how long it has been since two species have diverged from a common ancestor. The fossil record is usually derived from sedimentary rocks laid down millions of years ago.
Answer:
A. both parents had to give a recessive trait to their offspring
Explanation:
Both parents need to give a recessive trait because if there's any dominant ones, it'll overpower the recessive ones
The necessary element that forms part of the structure of dna and rna is <u>phosphorous</u><u>.</u>
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- A crucial part of DNA, the genetic "memory unit" of all living organisms, contains phosphorus.
- It is also a part of RNA, which reads DNA's genetic code to create proteins and other substances necessary for plant structure, seed production, and genetic transmission.
- All tissues and cells require phosphorus for growth, upkeep, and repair, as well as for the synthesis of DNA and RNA, the genetic building blocks.
- The nucleotides in a DNA sequence are joined by an alternating grey-dark grey sugar-phosphate backbone.
- The structural structure of nucleic acids, including DNA and RNA, is composed of the sugar-phosphate backbone. This molecule's directionality is determined by this backbone, which is made up of alternating sugar and phosphate groups.
- All living things require RNA as a vital component, and the phosphorus (P) it contains cannot be substituted.
learn more about phosphorous here: brainly.com/question/25352398
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Answer:
allelic frequency a = 30%
allelic frequency A = 70%
Explanation:
You are studying a population of sparrows in which the phenotype is determined by a single locus. Only two alleles for this locus are known for this population, which are distinguished by the codes 'A' and 'a'. The distribution of phenotypes in the population indicates that 49% of the population is homozygous 'AA', 42% is heterozygous and 9% 'aa' homozygous. How is the allele frequency for 'A' and 'a' determined based on these observations?
According to the case, the allelic frequency for A and a will be searched with the data:
homozygotes AA = 49%
heterozygotes Aa = 42%
homozygous aa = 9%
Frequency of homozygotes 'aa'
(q 2) = 9/100 = 0.09
we can obtain the allelic frequency of a through the following formula:
a (q) = √0.09
The result will be
= 0.3
we change to percentage
= 30%
we have the following formula
p + q = 1
to find the allele frequency A, represented by p
p = 1 - 0.3
we get the following result
p = 0.7
we change to percentage
= 70%
