Genetics Answers

I have a question about housekeeping genes? What is there effect on a cell if they are expressed at a higher level

Human ABO blood groups are controlled by a single gene with three alleles IA, IB, and i. The three alleles contribute to four blood group phenotypes. In addition to the ABO blood groups, there are two other loci that control blood phenotypes, the MN blood group locus and the Rh factor locus. The MN blood group has two codominant alleles, LM and LN. The Rh factor locus also has two alleles, Rh+ and Rh-, where Rh+ is dominant. The two phenotypes at the Rh factor locus are Rh+ and Rh-

Suppose in a population, the frequency of the ABO allele IA is 0.36, and the 1 allele frequency is 0.26. In the same population, the frequency of the LM allele is 0.47, and the frequency of the Rh+ is 0.62.

What is the frequency of the genotype IB i LM LN Rh+ Rh+ if the population is in Hardy-Weinberg equilibrium?

Hybridization of a homozygous dominant and homozygous recessive plant was conducted. What is the probability that the F2 will have the phenotype green, small and spade shaped leaves with pink and rounded fruits?

Suggest and explain how the genetic make-up of the seedling compares with that of the parent plant

A gene of curly hair structure dominates over a gene of straight hair structure and hemophilia is X-linked recessive disease in a human. A healthy woman with curly hair got married to a healthy man with straight hair. They had two children: a hemophilic son with curly hair and a healthy daughter with straight hair. Determine the genotypes of the parents and their children. Determine the probability of birth of a healthy son with straight hair structure

A brown-eyed girl with normal sight got married to a blue-eyed man with normal sight. The father of the girl was blue-eyed and color-blind. What is F1? It is known that gene of brown color of eye dominates over the gene of blue eye color. The gene of color blindness is recessive and X-linked.

The gene of daltonism is recessive X-linked. Woman with normal sight, whose father had daltonism, got married to sick man. Determine the phenotypes and genotypes of children in this family, and the probability of birth of healthy children.