In maize, colored kernal (C) is dominant to colorless (c) and non-sugary (Su) is
ID: 67911 • Letter: I
Question
In maize, colored kernal (C) is dominant to colorless (c) and non-sugary (Su) is dominant to sugary (su). An experiment was performed to determine if these genes assort independently. Pure-breeding colored, non-sugary plants were mated with colorless, sugary plants and the F1 progeny were mated among themselves to produce an F2 with the following results:
colored, non-sugary 1959
colored, sugary 593
colorless, non-sugary 642
colorless, sugary 220
DO THESE DATA SUPPORT THE HYPOTHESIS THAT THESE GENES ASSORT INDEPENDENTLY?
(Thanks again, I'm really far upstream without a paddle here)
Explanation / Answer
Mendel also hypothesized that allele pairs separate randomly, or segregate, from each other during the production of gametes: egg and sperm. Because allele pairs separate during gamete production, a sperm or egg carries only one allele for each inherited trait. When sperm and egg unite at fertilization, each contributes its allele, restoring the paired condition in the offspring. This is called the Law of Segregation. Mendel also found that each pair of alleles segregates independently of the other pairs of alleles during gamete formation. This is known as the Law of Independent Assortment.
The genotype of an individual is made up of the many alleles it possesses. An individual's physical appearance, or phenotype, is determined by its alleles as well as by its environment. The presence of an allele does not mean that the trait will be expressed in the individual that possesses it. If the two alleles of an inherited pair differ (the heterozygous condition), then one determines the organism’s appearance and is called the dominant allele; the other has no noticeable effect on the organism’s appearance and is called the recessive allele.
the Law of Dominance but it is not a transmission law, dominance has to do with the expression of the genotype and not its transmission. The upper case letters are used to represent dominant alleles whereas the lowercase letters are used to represent recessive alleles.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.