The term allele is the short form of allelomorph. Each gene consists of two alleles. The alleles are the alternative forms or variant forms of a gene or unit factor. Each gene consists of an allelomorphic pair. The alleles together constitute the genotype of a specific character of organisms. If a pair of alleles are similar, the genotype of the organism is called homozygous . If the pair of alleles are different, the genotype of the organism is called heterozygous . This can be explained by the following example: The character height consists of two varieties the tall represented by alleles TT and the dwarf is represented tt . The two alleles in a tall of dwarf height are similar and constitute homozygous genotype. The genotype Tt also represent the tall height but the two alleles are different comprises heterozygous genotype. It has been cleared that a dominant allele will overrule the characteristics of a recessive allele in a heterozygous genotype.

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 1

EASY

10th ICSE

IMPORTANT

Earn 100

"Like begets like", this applies only to animals.

50% studentsanswered this correctly

Important Questions on Genetics - Some Basic Fundamentals

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 1

The entire human population shows variations.

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 2

Which of the following in humans is/are established genetic traits?

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 1

Mention the total number of pairs of chromosomes in each body cell in humans. (23 pairs/ 25 pairs)

EASY

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 1

Number of pairs of autosomes in humans _____. (22 pairs/ 24 pairs)

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 2

A certain couple got only four daughters in a row and no son. Does it mean that the husband does not produce Y-bearing sperms? Explain.

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Exercise 2>Q 1

Think of a possibility of a marriage between carrier woman (XX^o ) and a colour blind man (X^oY). Is there a possibility of the birth of a colour blind daughter? Work out the progeny in the following Punnett square.

EASY

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 1

Write the basic unit of heredity?

MEDIUM

10th ICSE

IMPORTANT

Concise Biology Part-II Class 10>Chapter 3 - Genetics - Some Basic Fundamentals>Progress Check>Q 2

Define allele.