Haploids are able to express both recessive and dominant alleles / mutations because there are ____________.
many alleles for each gene
two alleles for each gene
only one allele for each gene in the individuals
only one allele in a gene
Phenotype of an organism is the result of _________________.
mutations and linkage
cytoplasmic effects and mutation
environmental changes and sexual dimorphism
genotype and environmental interactions
What is true about is isolated small tribal popualtions?
There is a decline in population as boys marry girl only from their own tribe
Hereditary diseases like colour blindness do not spread in teh isolated population
wrestlers who develop strong body muscles in their life time pass this cahracter on their progeny
There is no change in population sixe as they have large gene pool
Sex can be determined by examining cells from the aminotic fluid by looking for ______________.
Barr bodies
autosomes
chiasmata
kineochore
Telomerase is an enzyme which is a ________________.
repetitive DNA
RNA
simple protein
ribonucleoprotein
Two linked genes a and b show 20% recombination. The individuals of a dihybrid cross between ++ / ++ x ab / ab shall show gametes _______________.
++ 80 : ab : 20
++ 40 : ab : 40 : + a 10 : + b : 10
++ 30 : ab 30 : + a 20 : + b : 20
Which contribute to the success on Mendel?
Qualitative analysis of data
Observation of distinct inherited traits
His knowledge of Biology
Consideration of one character at one time
Haemophilia is more commonly seen in human males than in human females because _____________.
this diseases is due to an X -linked dominant mutation
a greater proposition of girls die in infancy
this diseases due to an x linked recessive mutation
this diseases is due to a Y linked recessive mutation
Acetabularia used in Hammerlinig's nucleocytoplasmic experiments is ______________.
unicellular fungus
multicellular fungus
unicellular green alga
unicellular multcellular green alga
Loss of an X chromosomes in a particular cell during its development results into ________________.
diploid individual
triploid individual
gynandromorphas
both (a) and (b)
