Genetics Answers

The human blood groups of ABO system are determined by three allelic genes: IA, IB, i0 . The combination of alleles i0 i0 determine the I(O) blood group, IA IA or IA i0 - II (A); IB IB or IB i0 - III (B); IA IB - IV (AB). In a family, in which mother has II blood group (heterozygote), her husband - I blood group. Determine the possible blood groups of their children.

Sickle cell anemia (S-anemia) and thalassemia are inherited as the incomplete autosome dominant characters. The genes of these diseases are non-linked. The heterozygous for S-anemia and thalassemia individuals do not have clinical symptoms. The carriers of S-anemia or thalassemia do not affect malaria. The diheterozygotes have crescent anemia. The homozygous for S-anemia and thalassemia individuals die in childhood. Determine the probability of the birth of healthy children in the family, in which one parent is heterozygous for both characters, and another is homozygous recessive.

Sickle cell anemia (S-anemia) is inherited as autosome incomplete dominant character. Homozygotes for dominant character die before puberty, the heterozygotes have subclinic anemia. The plasmodium can not use the S-hemoglobin and human with S-anemia has no malaria. What is the probability of the birth of children not stable to malaria, in a family, in which both parents are stable to malaria.

Carry out a genetic cross of your choice and work out the ratio of F1 and F2 offspring

Patrick and his partner Patricia recently had Lil’ Patty and Patricia is worried that the hospital made a mistake and mixed her baby with some other starfishes’. Lil’ Patty has a short head! Patrick is homozygous for his tall head and Patricia is heterozygous for her tall head. Create a Punnett square using T for the dominant gene and t for the recessive one.

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

Multiple questions. About 6