Answer:
The correct answer is- 4:0
Explanation:
Marfan syndrome is a genetic problem which affects the connective tissue in the body. The trait for this disease is autosomal dominant which means even one abnormal copy of this gene in the offspring or individual is sufficient to cause this syndrome.
Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.
S s
S SS Ss
S SS Ss
Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.
Answer:
Oxygen (O2) concerntration
Temperature
pH
1.Biological species concept
2.Cladistic species concept
3.Cohesion species concept
4.Competition species concept
5.Ecological species concept
6.Evolutionary species concept
7.Isolation species concept
8.Phenetic species concept
9.Phylogenetic species concept
10.Recognition species concept
11.Typological species concept
For descriptions just look them up :)
