Which of the following is a test cross ?
Tt x tt
TT x tt
Tt x Tt
tt x tt
A.
Tt x tt
A test cross is a cross between heterozygous F1 hybrid and recessive homozygous parent eg. Tt x tt to show whether F1 is homozygous or heterozygous.
Ozone depletion in stratosphere would result in
forest fires
global warming
skin cancer incidence
None of the above
In rabbit, head of epididymis present at the head of the testis is called
vas deferens
cauda epididymis
gubernaculum
caput epididymis
1 : 2 : 1 phenotypic and genotypic ratio is found in
complementary genes
blending inheritance
multiple alleles
pseudo alleles
the deficiency of nitrogen
a bacterium
a fungus
a virus