WorksheetsPatterns of inheritance of traits
Total questions: 22
Worksheet time: 13mins
Scientists who rediscovered the Mendel's laws:
Hugo de Vries, M. Correns, Gustav Tschermak
O. Avery, K. Macleod, M. McCarthy
G. Beadle and Tatum
J.Watson and F.Crick
Determine the initial form of parental individuals in the dihybrid cross:
AaBb x AaBb
Aabb x aabb
AABB x aabb
AABB x Aabb
What the law of inheritance manifested in the first generation of dihybrid cross?
the law of purity of gametes
the law of independent assortment
the law of independent combination of traits
the law of uniformity of hybrids in the first generation
How many types of gamete will be formed in diheterozygote?
(a)
What is the polymery?
genes encoding different manifestations of the trait
genes which give a new trait in a complementary combination
the causality of a particular trait of several pairs of nonallelic genes which have the same effect
allele genes which do not change each other
Determine the concept of «phenotype»:
the set of all external and internal traits and properties of the organism determined by the genotype and environmental conditions
the set of all hereditary traits and properties in a diploid set of chromosomes
the set of all external and internal traits and properties of the organism determined by environmental conditions
the set of all hereditary traits and properties in the haploid set of chromosomes
What formula is for the types of gametes?
(3+1)n
3:1
2n
9:3:3:1
What splitting of the phenotype observed in the second generation of monohybrid crossing?
1:1
3:1
9:1
9:3:3:1
An example of a non-allelic gene interaction
Incomplete Dominance
Codominance
Epistasis
Multiple Alleles
How can you establish whether an organism with a trait is heterozygous or homozygous? What type of crossing is necessary to conduct?
crossing with heterozygote
reciprocal
crossing with homozygote which has dominant trait
analyzing crossing of an individual with homozygous by recessive trait
How many types of gamete forms monoheterozygote?
(a)
What is the expressivity?
it is multiple mutations of the same locus in the chromosome
it is the degree of trait expression in the phenotype
it is the genetic composition of the individual
It is the observable traits of the individual, produced by the interaction of the genes and the environment
What kind of traits can be alternative?
yellow seed and white flower
yellow seed and green seed
green seed and wrinkled form of the seed
large stature and purple color of the flower
How many types of gamete form in triheterozygote?
(a)
When a pure breeding brown cat is mated to a pure breeding white cat, all the kittens born are brown.
What results would you expect when an F1 brown kitten is mated with a pure breeding white cat
100 % white kittens
100 % brown kittens
50 % brown kittens
50 % white kittens
75 % brown kittens
25 % white kittens
When a pure breeding brown cat is mated to a pure breeding white cat, all the kittens born are brown.
What results would you expect when an F1 brown kitten is mated
with another F1 brown kitten
100 % white kittens
100 % brown kittens
50 % brown kittens
50 % white kittens
75 % brown kittens
25 % white kittens
When a pure breeding brown cat is mated to a pure breeding white cat, all the kittens born are brown.
What results would you expect when an F1 brown kitten is mated
with a pure breeding brown cat
100 % white kittens
100 % brown kittens
50 % brown kittens
50 % white kittens
75 % brown kittens
25 % white kittens
In man brown eyes (B) are dominant over blue (b).
A brown eyed man married to a brown eyed woman
has a blue eyed child.
What would be the genotypes of the parents?
BB (man)
BB (woman)
Bb (man)
BB (woman)
Bb (man)
Bb (woman)
BB (man)
bb (woman)
Codominant traits
one that manifests only when the gene is in a homozygous state
both alleles in a heterozygous pair are expressed
one that manifests itself even when an allele is in a heterozygous state
when the mutant allele is located on the X chromosome, the disease will
generally be expressed in males
Dominant
one that manifests only when the gene is in a homozygous state
both alleles in a heterozygous pair are expressed
one that manifests itself even when an allele is in a heterozygous state
when the mutant allele is located on the X chromosome, the disease will
generally be expressed in males
A woman with 0 (I) bllod group has born a child with AB blood group. This woman’s husband has A blood group. What genetic interaction explains this phenomenon?
Codominance
Recessive epistasis
Polymery
Incomplete dominance
Pigmentation intensity of human skin is controlled by a few independent dominant genes. It is known that pigmentation is the more intensive, the bigger quantity of these genes. What is the type of interaction between these genes?
Polymery
Pleiotropy
Codominancy
Epistasis
