Mendelian Genetics 223 Name: Lab Section:_ Sign the University Academic Integrit
ID: 253759 • Letter: M
Question
Mendelian Genetics 223 Name: Lab Section:_ Sign the University Academic Integrity Policy: Date I understand and accept the UNCG Academic Integrity Policy. Pre-Lab Assignment Figure 9.8 illustrates one of Gregor Mendel's breeding experiments with his pea plants at In this particular experiment with pea plantGamees height, the P generation consisted of pure- breeding tall pea plants mated with pure- breeding dwarf pea plants. 1. Fill in the blanks of the following paragraphion concerning this experiment Gregor Mendel discovered several new ideas Agpearanca about inheritance when he performed breed- Gercmabeu ing experiments with pea plants during the on- so 1850s and 1860s. In one experiment, plants that were pure-breeding for the trait of being tall were crossed with plants that were pure- breeding for the trait of being dwarf; since those plants were "pure-breeding." they had genotypes. The gam- etes of the tall plants carried a tall factor," or , for the tall trait. The gametes of the dwarf plants carried a dwarf fac- tor,"or trait. All the F, plants were tall, indicating that for the dwarf the tall factor was over the dwarf factor. All the F, plants had a Figure 9.8. One of Mendel's breeding experiments genotype. To get the F, generation, Mendel crossed plants of with each other. 9 The trait-dwarf height-returned in the F2 generation. genotype because they had two of the Dwarf plants had a same BIO 111LExplanation / Answer
1.
Homozygous.
Allele.
Allele.
Dominant.
Heterozygous.
F1.
Recessive.
Homozygous recessive.
Alleles
2.
Phenotype.
50%.
25%.
Dwarf.
3.
Because both these chromosomes have same shape,morphology, size and arrangement of genes hence they are homologous chromosomes.
Genotype of this plant is heterozygous because it carries two different alleles on two homologous chromosomes.
Phenotype of this plant will be tall because, it has allele T controlling tallness and allele t controlling dwarfness and allele T is dominant over allele T. Hence phenotype of this plant will be tall.
These alleles would be separated in the process of meiosis .
These two alleles would be brought back in the process of fertilization.