Explain why a food web is a more realistic model of energy flow than a food chain.
2 answers:
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Answer:
1. Probability is 50% or 1/2
2. a) Genotypic ratio= 1 AA: 2Aa : 1aa
b) Phenotypic ratio = 3 normal pigment : 1 albino
3. Monohybrid cross
Explanation:
This question involves a single gene coding for pigment in humans. The allele for normal pigmentation (A) is dominant over the allele for albinism (a).
According to this question, if two heterozygous parents (Aa) are crossed i.e. Aa × Aa. The following proportion of offsprings will be produced:
AA, Aa, Aa, and aa
- Hence, the probability of having a heterozygous offspring is 2/4 or 1/2 or 50%
- Genotypic ratio= 1 AA: 2Aa : 1aa
Phenotypic ratio = 3 normal pigment : 1 albino
c. This type of cross is called MONOHYBRID CROSS because it involves a single gene
