MENDELISM -1 KVFW XII BASIC

Law of independent assortment can be explained with the help of

• DIHYBRID CROSS
• TEST CROSS
• BACK CROSS
• MONOHYBRID CROSS

A true breeding line is one, that:-

• a)      Having crossed with superior quality.
• a)      Only superior quality.
• a)      The best out of inferior quality.
• Having undergone continuous self-pollination.

Genes coding for a pair of contrasting traits are?

• FACTORS
• ALLELES
• CODONS
• HOMOZYGOUS

The cross between recessive to its hybrid or its F1 plant is called

• MONOHYBRID CROSS
• DIHYBRID CROSS
• TEST CROSS
• BACK CROSS

When a cross between a pure tall plant with green pod and a pure short plant with yellow pod. How many short plants are produced in F2 generation out of 16?

• 1
• 9
• 3
• 4

Incomplete dominance is shown by:

• HELIANTHUS
• CHINA ROSE
• PRIMOSE
• SNAPDRAGON

Which of the following will not result in variations among siblings?

• Independent assortment of genes
• Crossing over
• Linkage
• Mutation

In Mendelian genetics one of the following characters is NOT the dominant :

• TERMINAL FLOWER
• YELLOW SEED
• ROUND SEED
• GREEN POD

A pea plant heterozygous for yellow round seeds was crossed with recessive plant, the proportion of RrYy to the progeny produced in the next generation will be

• 3/4
• 1/4
• 2/3
• NONE OF THESE

In a simple Mendelian monohybrid cross, true-breeding tall plants are crossed with short plants, and the F1 plants, which are all tall, are allowed to self-pollinate. What fraction of the F2 generation are both tall and heterozygous?

• 3/4
• 1/4
• 1/2
• 1/3