Download Test (1) If there are four children in a family with a different blood

Test (1) If there are four children in a family with a different blood types,
the genotypes of their parents are:
a) AB and AB
b) A and B
c) A and O
d) B and AB
e) AB and O
Test (2) monogenic traits are controlled by:
a) allelic genes;
b) non-allelic genes;
c) codominant genes.
Test (3) polygenic traits are controlled by:
a) allelic genes;
b) non-allelic genes;
c) codomiant genes.
4. The linkage genes are:
1. Allelic genes
2. Genes of one chromosome
3. Non-allelic genes
4. Genes of non-homologues chromosomes
5. Non-allelic genes are:
1. The genes of one chromosome
2. The genes of the identical locus’s of the homologues chromosomes
3. The genes of non-homologues chromosomes
4. The mutated variants of one gene
5.
6. The gene for Alkaptonuria (ALK) has recently been shown to lie on human
chromosome 9 and to be linked to the gene encoding the ABO blood group, with a
recombination frequency of 11% between the loci. The two alleles at the ALK locus will
be denoted A and a. The three alleles at the ABO blood group locus will be denoted I A,
IB and i.
The parent has blood type 0 and alkaptonuria, another – blood type A and normal
(heterozygous for both loci). What is the probability of birth the normal children with
blood group A?
7. An organism has genotype AB//ab (genes are linked together; the frequency of
crossing over is 10%). What is the frequency of the different types of the gametes?
8. Cataract and polydactyl are controlled by dominant genes, linked together on one
chromosome. Female was inherited cataract from her mother and polydactyl from her
father, her husband is normal. What is the real chance for their children?
a) have no disease
b) have one disease
c) have both diseases?
9. Linkage:
cross 1: rough, soft pea X smooth, hard pea
gives F1: all rough, hard
cross 2: rough, hard F1 X smooth, soft (note: different mating than usual)
gives F2: 115 rough soft
110 smooth hard
8 rough hard
12 smooth soft
Using the symbols for genes, define the genotypes of the parents and offspring and the
distance between the genes A and B.