Answer:
The underlying principle of SEC is that particles of different sizes elute (filter) through a stationary phase at different rates. This results in the separation of a solution of particles based on size.
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The major causes of biodiversity decline are land use changes, pollution, changes in atmospheric CO2 concentrations, changes in the nitrogen cycle and acid rain, climate alterations, and the introduction of exotic species, all coincident to human population growth.
True because when you have a gene it replicates.
Answer and Explanation:
<u>Available data</u>:
- S allele expresses sharp spines, and it is dominant
- s allele expresses dull spines, and it is recessive
- N allele expresses the presence of spines, and it is dominant
- n allele expresses the absence of the spines, and it is recessive
<u>Cross:</u> Doubly heterozygous SsNn individuals allowed to self-pollinate
Parental) SsNn x SsNn
Gametes) SN sN Sn sn / SN sN Sn sn
Punnet square) SN Sn sN sn
SN SSNN SSNn SsNN SsNn
Sn SSNn SSnn SsNn Ssnn
sN SsNN SsNn ssNN ssNn
sn SsNn Ssnn ssNn ssnn
- 9/16 individuals with sharped spines, S-N-
Their genotypic ratios are 1/16 SSNN, 2/16 SSNn, 2/16 SsNN, 4/16
SsNn
- 3/16 individuals with dull spines, ssN-
Their genotypic ratios are 1/16 ssNN and 2/16 ssNn
- 4/16 individuals with no spines at all, --nn
Their genotypic ratios are 1/16 SSnn, 2/16 Ssnn, and 1/16 ssnn.