|
A pea plant with blue colour flower denoted by BB is cross-bred with a pea plant with white flower denoted by ww
|
|
1
|
12978
|
August 17, 2020
|
|
1. Why did Mendel choose garden pea for his experiments? Write two reasons
|
|
1
|
3570
|
April 2, 2019
|
|
Define evolution. How does it occur? Describe how fossils provide us evidences in support of evolution
|
|
1
|
3240
|
April 2, 2019
|
|
How do Mendel’s experiments show that the (a) traits may be dominant or recessive
|
|
1
|
847
|
April 2, 2019
|
|
Explain how the sex of the child is determinated at the time of conception in human beings
|
|
1
|
1133
|
April 2, 2019
|
|
(i) What is ‘genetics’? (ii) Give the common name of the plant on which Mendel performed his experiments
|
|
1
|
2078
|
April 2, 2019
|
|
What is an organic evolution? It cannot be equated with progress. Explain with the help of a suitable example
|
|
1
|
1910
|
April 2, 2019
|
|
How did Mendel explain that it is possible that a trait is inherited but not expressed in an organism?
|
|
1
|
1751
|
April 2, 2019
|
|
How do Mendel’s experiments show that (a) traits may be dominant or recessive?
|
|
1
|
1167
|
April 2, 2019
|
|
How did Mendel’s experiments show that different traits are inherited independently? Explain
|
|
1
|
1631
|
April 2, 2019
|
|
“Natural selection and speciation leads to evolution.” Justify this statement
|
|
1
|
1396
|
April 2, 2019
|
|
Mention the total number of chromosomes along with the sex chromosomes
|
|
1
|
1920
|
April 2, 2019
|
|
How does Mendel’s experiment show that traits are inherited independently?
|
|
1
|
1753
|
April 2, 2019
|
|
“Two areas of study namely ‘evolution’ and ‘classification’ are interlinked”. Justify this statement
|
|
1
|
639
|
April 2, 2019
|
|
List three distinguishing features, in tabular from, between acquired traits and inherited traits
|
|
1
|
697
|
April 2, 2019
|
|
In a monohybrid cross between tall pea plants (TT) and short pea plants (tt),
|
|
1
|
1986
|
April 2, 2019
|
|
How did Mendel interpret his results to show that traits may be dominant or recessive? Describe briefly
|
|
1
|
1817
|
April 2, 2019
|
|
“It is a matter of chance whether a couple will have a male or a female child.”
|
|
1
|
13907
|
April 2, 2019
|
|
Define the term ‘evolution’. “Evolution should not be equated with progress.” Give reason to justify this statement
|
|
1
|
995
|
April 2, 2019
|
|
Explain Mendel’s experiment with peas on inheritance of characters,
|
|
1
|
1704
|
April 2, 2019
|
|
“A trait may be inherited, but may not be expressed.” Justify this statement with the help of a suitable example
|
|
1
|
5543
|
April 2, 2019
|
|
(a) Mendel crossed tall pea plants with dwarf pea plants in his experiment
|
|
1
|
3364
|
April 2, 2019
|
|
How are fossils formed? Describe, in brief, two methods of determining the age of fossils
|
|
1
|
3185
|
April 2, 2019
|
|
What is meant by the term ‘speciation’? List four factors which could lead to speciation
|
|
1
|
810
|
April 2, 2019
|
|
If we cross pure-bred tall (dominant) pea plant with pure-bred dwarf (recessive) pea plant
|
|
1
|
13223
|
April 2, 2019
|
|
A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb
|
|
1
|
9626
|
April 2, 2019
|
|
Explain how evolutionary relationships can be traced by the study of homologous organs
|
|
1
|
909
|
April 2, 2019
|
|
State the evidence we have for the origin of life from inanimate matter
|
|
1
|
1053
|
April 2, 2019
|
|
Describe any three ways in which individuals with a particular trait may increase in population
|
|
1
|
966
|
April 2, 2019
|
|
Explain the terms: (i) Speciation (ii) Natural selection
|
|
1
|
934
|
April 2, 2019
|