1. Starting with the individuals AAbbFFgg and aaBBffGG, where complete dominance and independent assortment occur for each pair of alleles, Fl and F2 generations are obtained. Give the probabilities for obtaining each of the following genotypes in the F2? a) AABBFFGG b) aabbffgg c) AaBbFfg
1. Starting with the individuals AAbbFFgg and aaBBffGG, where complete dominance and independent assortment occur for each pair of alleles, Fl and F2 generations are obtained. Give the probabilities for obtaining each of the following genotypes in the F2? a) AABBFFGG b) aabbffgg c) AaBbFfg
Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Transcribed Image Text:### Genetics Problem: Probability of Genotypes in F2 Generation
**Problem Statement:**
Starting with the individuals AAbbFFgg and aaBBffGG, where complete dominance and independent assortment occur for each pair of alleles, F1 and F2 generations are obtained. Give the probabilities for obtaining each of the following genotypes in the F2:
a) AABBFFGG
b) aabbffgg
c) AaBbFfGg
d) aaBBFFGg
e) AaBbFfGg
**Task:**
Indicate which of these you would be able to unambiguously identify by just looking at the phenotype.
**Explanation:**
1. **AABBFFGG:**
- This genotype includes only dominant alleles (A, B, F, G).
- It would express all dominant traits visibly.
2. **aabbffgg:**
- This genotype includes only recessive alleles (a, b, f, g).
- It would express all recessive traits visibly.
3. **AaBbFfGg:**
- This genotype is heterozygous for all traits.
- It would express dominant traits for each gene pair, but also has recessive alleles.
4. **aaBBFFGg:**
- Homozygous recessive for the 'a' allele.
- Homozygous dominant for 'B', 'F' alleles, and heterozygous for 'G'.
- It would show dominant traits for B, F, G, and recessive traits for 'a'.
5. **AaBbFfGg:**
- Identical to option c.
- Heterozygous for all traits, expressing all dominant traits but carrying recessive alleles.
From the given genotypes:
- AABBFFGG and aabbffgg can be unambiguously identified by just looking at the phenotype since they are entirely dominant or recessive, respectively.
- The others (c, d, and e) cannot be clearly identified by phenotype alone due to the presence of both dominant and recessive alleles.
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