With codominance eg i and in alleles in Blood type determina

With codominance (e.g., i and i^n alleles in Blood type determination), a likely ratio in F2 offspring resulting from a monohybrid cross would be ____. A) 1:2 B) 1:2:2:4 C)1:2:1 D)9:3:3:1 E) 3:1 A condition in which one gene pair masks the expression of a nonallelic gene pair is _____ which involves the interaction of genes that are not alleles, in particlular the suppression of the effect of one such gene by another. A) codominance B) epistasis C) dominance D) recessivencess E) additive alleles Mendel\'s monohybrid and dihybrid ratios are hypothetical predictions which are which of the following assumptions? A) Each allele is domainant or recessive B) Segregation is unimpeded. C) Dependent assortment occurs. D) Fertilization is random A hypothesis that assumes no real difference between measured values (or ratio) is called _____ A) Alternate hypothesis H_0 B) Null hypotheiss H_0 The Chi-square test involves a statistical comparison between measured predicated (expected) values. One generally determines degrees of freedom A) the number of categories being compared B) one less than the number of classes being compared C) one more than the number of classes being compared D) ten minus the sum of the two categories E) the sum of the two categories

Solution

2) In codominance, two alleles are expressed simultaneously and the ratio is 1:2:1. In the blood group AB, both A and B antigen will be expressed.

3) When there is dominance between two genes and not between alleles of a gene, it is called as epistasis. Other options are based on alleles of a gene.

4) Dependent assortment is not part of Mendel\'s assumptions which are Dominant/recessive, Law of Segregation, fertilization is random and Law of Independent Assortment

5) Null hypothesis H0 : there is no statistical difference between two variables or between measured and expected values.

6) One less than the number of classes being compared.

Degrees of freedom = 1 - n, where n is number of genotypes.