Answer:
1/4 are light tailed mouse
Explanation:
Given
T(With Tail) is dominant over t (tailless)
L (dark tail ) is dominant over l (light color tail)
A cross is made between TtLl and TtLl
TL Tl tL tl
TL TTLL TTLl TtLL TtLl
Tl TTLl TTll TtLl Ttll
tL TtLL TtLl ttLL ttLl
tl TtLl Ttll ttLl ttll
Genotype of offspring are –
TTLL – 1
TTLl – 2
TtLL – 2
TtLl – 4
TTll- 1
Ttll- 2
ttLL – 1
ttLl - 1
ttll- 1
Light colored tail species - TTll, Ttll, ttll
Out of 16 , 4 are light colored
Thus 1/4 are light tailed mouse
Watson and Crick's model explained mutability because bases pairs can suffer changes (mutations) during DNA replication. Moreover, this model also explained stability because DNA strands are held together by hydrogen bonds.
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of four types of nucleotides, each containing one different nitrogenous base, i.e., Adenine, Guanine, Cytosine and Thymine.
In Watson and Crick's model, both DNA strands are held together by hydrogen bonds between nitrogenous bases on opposite DNA strands, thereby providing stability to the DNA molecule.
In DNA, Guanine always pairs with Cytosine by three hydrogen bonds, while Adenine always pairs with Thymine by two hydrogen bonds.
Moreover, Watson and Crick suggested that mutations could occur as a consequence of a base occurring very infrequently in one of the less likely tautomeric forms during DNA replication, thereby also explaining the mutability of life.
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