Question

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Hi mc woulu womplement 10. If alleles m1 and m2 are nonallelic which of the following genotypes properly describe the outcome of the cross described above? A. ml/m2 C.ml/+;m2/+ B. mlm2/++ D.ml+/+m2 11. If alleles m1 and m2 are nonallelic, which of the following words best describes the F1 hybrid genotype? A monohybrid A heterozygote A compound heterozygote A repulsion dihybrid A coupling dihybrid 12. If alleles m1 and m2 are nonallelic which of the following would you expect to be true (Choose exactly two checkboxes)? The F1 hybrid would have a wildtype phenotype The F1 hybrid would have a mutant phenotype m1 and m2 would fail to complement m1 and m2 would complement

Answer 1

1. If two genes are non-allelic, then there is no gene which is aligned on a similar locus of a particular character. As m1 and m2 are two nonallelic then it is a chance of epistasis where one gene modifies how another is expressed. But we know that they are recessive non alleles with the mutant phenotype, so when they will cross with each other then we will get m1/m2 genotypes from m1/m1 homozygotes and m2/m2 homozygotes crossing. Hence, option A is correct.

2.If alleles m1 and m2 are nonallelic, then F1 hybrid genotype must be a monohybrid due to only one nonallelic form is considered. Hence, option A is correct.

3. If alleles m1 and m2 are nonallelic, then the F1 hybrid would have a mutant phenotype due to the presence of a mutant gene which suppresses/ masks the phenotype of m1 nonallele. Again m1 and m2 would fail to complement. It may have a chance of F1 hybrid would have a wild phenotype.

Hence, options A,B and C are correct.