Which of following genotype will produce moderately dark skin phenotype in humans?
a) AABBCc
b) AABbCC
c) AaBBCC
d) all of these
Explanation: five alleles out of six produce dark shade in human skin
Which of following genotype will produce brown skin phenotype in humans?
a) AABbCc
b) AaBbCC
c) AaBBCc
d) all of these
Explanation: four alleles out of six produce dark shade in human skin resulting brown colour skin
Which of following genotype will produce light brown skin phenotype (mulatto) in humans?
a) AaBbCc
b) AaBbCC
c) AaBBCc
d) all of these
Explanation: three alleles out of six produce dark shade in human skin resulting light brown colour skin i.e. mulatto
Which of following genotype will produce pinkish brown skin phenotype in human beings population?
a) AaBbcc
b) aaBbCc
c) AabbCc
d) all of these
Explanation: two alleles out of six produce dark shade in human skin resulting pinkish brown colour skin
Which of following genotype will produce whitish brown skin phenotype in human beings population?
a) Aabbcc
b) aaBbcc
c) aabbCc
d) all of these
Explanation: one allele out of six produces dark shade in human skin resulting whitish brown colour skin
Gene Linkage and Crossing Over:
Genes located on the same chromosome that tends to be inherited together in genetic crosses are said to be………..
a) dominant genes
b) linked genes
c) epistatic genes
d) non-linked genes
The phenomenon in which genes on the same chromosome inherited together in genetic crosses is called……..
a) epistasis
b) gene dominance
c) gene linkage
d) gene masking
If the genes are linked on autosomes, their linkage is called……….linkage.
a) autosomal
b) sex
c) dominant
d) recessive
Explanation: “Autosomal” means that the gene in question is located on one of the numbered, or non-sex, chromosomes.
If the genes are linked on sex chromosomes, their linkage is called…… linkage.
a) autosomal
b) sex
c) dominant
d) recessive
All the linked genes found on the……… pair of chromosome form a group, known as linkage group.
a) same homologous
b) different non-homologous
c) same chromosome
d) different chromosome
Explanation: so the number of linkage group in an organism are equal to the number of homologous pair of chromosomes in that organism.
Which of the following genes are found on chromosome 11 in human?
a) sickle cell anemia
b) leukemia
c) albinism
d) all of these
Explanation: these traits are supposed to be in the same linkage group
Thalassaemia major is also known as…
a) Cooley’s anemia
b) sickle cell anemia
c) mycocytic anemia
d) nutritional anemia
Explanation: Hemoglobin S is an abnormal form of hemoglobin that causes the red cells to become rigid, and sickle shaped. This is commonly called sickle cell anemia
Which of following genotype will produce light brown skin phenotype (mulatto) in humans?
a) AaBbCc
b) AaBbCC
c) AaBBCc
d) all of these
Explanation: three alleles out of six produce dark shade in human skin resulting light brown colour skin i.e. mulatto
Which of following genotype will produce pinkish brown skin phenotype in human beings population?
a) AaBbcc
b) aaBbCc
c) AabbCc
d) all of these
Explanation: two alleles out of six produce dark shade in human skin resulting pinkish brown colour skin
Which of following genotype will produce whitish brown skin phenotype in human beings population?
a) Aabbcc
b) aaBbcc
c) aabbCc
d) all of these
Explanation: one allele out of six produces dark shade in human skin resulting whitish brown colour skin
Gene Linkage and Crossing Over:
