Revision

Question 1

Line generated during cross fertilization are called

Answer 1

Inbreed line

Question 2

The 7th generation are referred to as

Answer 2

Pure lines

Question 3

List 3 ways to overcome incompatibility

Answer 3

Electric shock
Bud pollination
Grafting

Question 4

Why are high breeds heterogenous and homogenous

Answer 4

Because they are all F1

Question 5

What is a Jimpler

Answer 5

It is the total number of varieties of gene and Allele in a sexually reproducing population that are available for transmission of traits to the next generation

Question 6

The nucleus,chloroplast,mitochondria have genes in the —— cells

Answer 6

Plant

Question 7

What is plant breeding

Answer 7

It is the branch of agriculture that deals with the manipulation/manipulating of the heredity of plants to produce more improved ones

Question 8

List 3 factors of plant breeding

Answer 8

Producer need
Consumer need/preference
Environmental impact

Question 9

What is Evolution

Answer 9

It is the change in gene frequency with time

Question 10

—- is the number of chromosome

Answer 10

Ploidy

Question 11

Name the gamete formation in plant for make and female

Answer 11

Microsporogenesis-male
Megasporogenesis-female

Question 12

—- is the genetic material of plant

Answer 12

Germ plasm

Question 13

What is the primary tool of plant breeding

Answer 13

Selection

Question 14

— is opposite and complimentary to inbreeding

Answer 14

Heterosis

Question 15

Which gene restores fertility

Answer 15

Restoral gene

Question 16

Offsprings inherit female mitochondria.True/false

Answer 16

False.they inherit the cytoplasm

Question 17

Cytoplasmic make sterility is used

Answer 17

In sorghum breeding

Question 18

List the 3 types of sterility

Answer 18

True
Induced
Functional

Question 19

Differentiate between heteromorphic and homomorphic

Answer 19

Heteromorphic is the morphological differences I.e stigma and style
While homomorphic is the difference in size/length of the pistillate and staminate

Question 20

Recessive alleles are deletenous in animal.True/false

Answer 20

False.they are deletenous in plants

Question 21

Most cytoplasm are in — gamete

Answer 21

Female

Question 22

When does incompatibility occurs

Answer 22

After fertilization

Question 23

Differentiate between monoploid,haploid,diploid and polyploid

Answer 23

-Monoploid;basic set of chromosomes and represented by X
-Haploid;division of the diploid represented by n.it is the gametic cell
-Diploid;a somatic cell represented by 2n
-polyploid is the state of possessing multiple basic chromosome set

Question 24

The deletion or addition to a specific chromosome is called

Answer 24

Aneuploidy

Question 25

The intermediate between two polyploidy extremes are called

Answer 25

Segmented Alloploidy

Question 26

What’s the difference between Autoploidy and Alloploidy in polyploidy

Answer 26

Autoploidy has the same background and possesses identical genomes from a single ancestral species and it’s on one extreme .While Alloploidy comprises of two or more genomes,different but relating species and it’s on the other extreme

Question 27

Differentiate between Aneuploid and Euploid

Answer 27

Aneuploid deals with specific chromosome Euploid deals with specific set of chromosome

Question 28

What’s the effect of doubling chromosome

Answer 28

It increases size of crops and reduces fertility

Question 29

What brings complexity to the genetics

Answer 29

Increasing ploidy level

Question 30

Differentiate between primary introduction and secondary introduction

Answer 30

Primary introduction;introduced cultivars can be used directly as cultivars Secondary introduction;introduced cultivars are used as parents

Question 31

What is H^2B and H^2N

Answer 31

H^2B is broadsense heritability H^2N is narrowsense heritability

Question 32

An activity to survive is referred to as

Answer 32

Acclamatization

Question 33

A major difference between the additive variance and dominant variance is

Answer 33

Additive variance doesn’t require e interactions with other alleles while dominant variance interacts with other allele to form a greater trait

Question 34

The most useful form of gene action is

Answer 34

Additive gene action

Question 35

What’s the difference between qualitative and quantitative traits in terms of heritability

Answer 35

Qualitative-low heritability Quantitative-high heritability

Question 36

When a recessive gene that has been suppressed by dominant allele is able to express itself.this is referred to as

Answer 36

Pseudodominance