After fertilisation, the F1 heterozygote will be formed i.e YyRr (yellow and round). On selfing F1 we get two possible combinations i.e YR, Yr, yR, yr. Therefore four types of gametes are formed in the ratio of 1:1:1:1. Thus, the correct answer is option D.
How many types of gametes can be produced by a YyRr plant?
Thus, there are four equally likely gametes that can be formed when the YyRr heterozygote is self-crossed, as follows: YR, Yr, yR, and yr.
How many types of gametes are produced by?
Gametes carry half the genetic information of an individual, one ploidy of each type, and are created through meiosis, in which a germ cell undergoes two fissions, resulting in the production of four gametes. In biology, the type of gamete one produces determines the classification of their sex.
What means allele?
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. …
What 4 gametes are produced from the two traits TtYy?
Since genotype TtYy is heterozygous for two genes i.e. it has both dominant and recessive alleles of two genes, it will form total four types of gametes. The gametes are TY, Ty, tY and ty.
What type of gametes are produced in a plant of genotype TtRr?
Each plant produced haploid sex gametes by meiosis.
How do you calculate gametes?
Simply place a 2 above each heterozygous gene pair and a one above each homozygous gene pair. Then multiply the numbers together to obtain the total number of different possible gametes.
How many types of gametes will be produced in female fruit fly?
Thus, you can deduce that the fly with the unknown genotype produced two types of gametes, EB and Eb, in equal frequencies.