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Why did one of the characteristics for example dwarfness or white flower color disappear in the F1 generation of Mendal's crosses?
Wiki User
∙ 13y ago
Since the F1 generation of crosses is a cross between two pure traits (for example, TT for tall and tt for short/dwarfness), the offspring of the pure parents all have the genotype of Tt: 100% of offspring will be tall. The dwarfness seems to "disappear" because the capital T is dominant, while the lowercase t (for shortness) is recessive. Dominant dominates a recessive trait, so only tallness appears and dwarfness seems to disappear.
Additional Info: However, even though the dwarfness seems to "disappear" it is still in the genotype although it does not appear in the F1 generation. In the F2 generation, there will be a 25% chance of the offspring having the trait dwarfness, because the F1 generation is crossed (Tt x Tt).
Wiki User
∙ 13y ago
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What did gregor mendals f1 generation show?
-_-
What is the ratio of tall to short plants in the F2 generation of mendals experiments?
F1: all tall F2: 1:3 short:tall
What did scientists learn about traits as they related to mendals experiments?
you guys are stupid n don't know what your talking about if ou cant answer a question like this
What does Gregor Mendel law of dominance state?
Mendel's law of dominance states that if you have a pair of genes then the one that shows up in the offspring is most likely the dominant gene because the dominant is passed along more often than the recessive.
What states that each gene pair is inherited independently of the gene pairs for other traits?
This law is called Mendel's second law, or the Law of Independent Assortment. The law is derived from observations of dihybrid crosses. A classic example involves seed shape and color in garden peas. The shape may be round (caused by a dominant allele, denoted by R) or wrinkled (recessive, r). The wrinkling is caused by a mutation preventing the formation of branches in starch molecules. The color of the seeds may be yellow (dominant, Y) or green (recessive, y). The green color results from a variant sequence in a gene; the seeds fail to develop normally. Parentals are RRYY and rryy. The F1 plants are RrYy. The F2 plants show independent segregation of the alleles for the two characteristics, shape and color. A Punnett grid predicts a 9:3:3:1 ratio for the phenotypes round yellow, round green, wrinkled yellow, and wrinkled green.
