unit 3 quiz 1

The gene which prevents the appearance of the effect of the other gene is known as .........

• homozygous

• heterozygous

• dominant

• recessive

the two factors of a hereditary trait are similar in the ................ individual

• pure

• hybrid

• recessive

• a and c

on mating two hybrid parents, the percentage of recessive traits in offspring is ........... %

• 75

• 50

• 25

• zero

the genetic structure of a dwarf stem pea plant and its flowers are white is .....

• ttRR

• TTrr

• ttrr

• TTRR

the genetic structure of wrinkled yellow coloured seeds of a pea plant is ..........

• YYSS

• yyss

• YYss

• yySS

from the dominant trait in the human being is the ............. trait

• straight hair

• wide eyes

• no dimples in the face

• presence of freckles in the face

in Mendel's second law, the alternative traits are inherited ...................

• independently

• dependently

• separately

• collectively

when mating a short male wing of Drosophila insect with a long female wing, all the first generation are of long wings. if a male and a female from this generation mate, the predicted percentage for appearance of long wings insects in the second generation is ...............

• 25%

• 50%

• 75%

• 100%

Mendel's second law is known as the law of ................ of factors

• independent assortment

• segregation

• merging

• disappearance

on crossing male and female, their genotype is (Bb) so the ratio of the genotype (BB) which produced in their offspring to the total number of offspring is .....................

• 1/4

• 1/2

• 3/4

• 1/1