A recessive allele in tigers causes the white tiger. If two normally pigmented t
ID: 164869 • Letter: A
Question
A recessive allele in tigers causes the white tiger. If two normally pigmented tigers are mated and produce a white offspring, what percentage of their remaining offspring would be expected to have normal pigmentation with homozygote genotype? 25% 50% about 66% 75% about 90% Which statement below is incorrect? Genes are units of inheritance-found in alternative versions called alleles Genotype: genetic (allelic) makeup of individual for specific trait (e.g., DD, Dd, dd) and Phenotype: physical expression of trait (e.g., tall and dwarf). Recessive allele in a heterozygous condition is the allele that is not expressed. The allele that encodes the phenotype most common in a particular natural population is known as the dominant type allele. The other allele is known as a mutant form of that allele. The mutant allele could be either dominant or recessive. It is quite random. A condition in which one gene pair masks the expression of a nonallelic gene pair is called _____ which involves the interaction of genes that are not alleles, in particular the suppression of the effect of one such gene by another. codominance epistasis dominance recessiveness additive alleles Which below is wrong statement for the procedures on Dihybrid crosses? Examination of 2 separate traits in a single cross Produced true-breeding lines for 2 traits, e.g., RRYY and rryy F1 generation produced by crossing two pure breeding parents, e.g., RRYY rryy The F1 generation of a dihybrid cross (RrYy) shows only the recessive phenotypes for each trait Allow F1 to self-fertilize to produce F2 Which below is incorrect for testcross? The cross used to determine the genotype of an individual with dominant phenotype To cross the individual with unknown genotype (e.g. P_) with a homozygous recessive (e.g., pp) Phenotypic ratios among offspring are different, depending on the genotype of the unknown parent. Determine if individual displaying dominant phenotype is homozygous or heterozygous for that trait Testcross always uses homozygous dominant individual crossed with unknown genotypes individual.Explanation / Answer
Answer 4.
Dominant traits are the traits that show there irrespective of the fact that they are homozygous or heterogygous whereas recessive characters are shown only when they are present only in homozygous condition.
Option D is incorrect-In dihybrid cross in F1 generation the phenotype of Dominant are visible not the recessive traits
5. test cross is across where F1 generation progeny are crossed with the homozygous recessive traits. A test cross is done to check the genotype of the F1 progeny whether they are homozygous dominant or heterozygous dominant.
Option E is incorrect