EXERCISE
(Question Bank)
Very Short Answers (1 Mark)
1 Define variation
What is monohybird cross?
3. What is dominant trait.
What are genes?
Define Homologous organs
If an individual has XX chromosome (22+XX) will that individual be male
or female
7. Which plant Mendel had choosen for his experiments.
How do Mendel's experiment show that traits may be dominant or recessive?
Define analogous organs? Give example,
Answers
Answer:
1. noise or natural patterns are known as variation.
2. it is a mix between two individuals who have homozygous genotypes.
3. it is a phenotypically gene expressed in hetrozygotes.
4. it is a unit of dna by which genetic information is passed from parent to offspring.
5.these are the that have same origin in different organisms. EX. forelimbs in man, cheetah, whale and bat
Explanation:
Answer:
1.a change or slight difference in condition, amount, or level, typically within certain limits.
2.A monohybrid cross is a cross between two organisms with different variations at one genetic chromosome of interest. ... When a cross satisfies the conditions for a monohybrid cross, it is usually detected by a characteristic distribution of second-generation (F2) offspring that is sometimes called the monohybrid ratio.
3.In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive.
4.unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
5.Homologous organsmay be defined as theorgans of different animals which have similar basic structure but different functions. ... The presence of same basic structure in the flippers of whale, forelimbs of frog and man shows that all these organisms are closely related and have evolved from a common ancestor.