Biology questions: Please answer all of them True or false. If false then state correct answer 1. The frequency of crossing over decreases with the distance seperating genes on a chromosome. 2. Codominant alleles are expressed equally. 3. Under normal rules of domininace, if two diffferent alleles are present, the dominant allele is expressed. 4. A mutagen is a substance that causes a change in DNA. Multiple Choice questions: 5. A DNA nucleotide does not contain A. adenine B. thymine C. uracil 6. Human blood type is determined by A. codominant alleles B. a dominant alleles C. multiple alleles D. sex-linked genes 7. People who carry genetic disorders (carriers) are A. codominant alleles B. thymine C. uracil D. cytosine 8. A method to trace the inheritance of a trait over many generations is called a A. carrier tree B. pedigree C. phenotype D. genotype 9. The insertion or deletion of a single base pair of DNA results in a A. missense mutation B. nonsense mutation C. duplication mutation D. frameshift mutation 10. Gregor Mendel called the generation created by crossbreeding the parental generation the A. second parental generation B. cross filial generation C. duplication mutation D. frameshift mutation. 11. A recessive trait is expressed only in a individual who is A. heterozygous B. homozygous C. haploid D. polygenic 12. A tall pea plant (TT) and a tall pea plant (Tt) have the same A. alleles B. phenotype C. genotype D. filial type 13. The faliure of homolougus chromosomes to seperate properly during meiosis is calles A. nondisjunction B. disjunction C. zygote faliure D. telomere faliure 14. Watson and Crick\'s model of DNA replication is called A. conservation B. semiconservative C. transcription D. translation 15. Pea plants usually reproduce by A. self-pollination B. cross-pollination C. teste-crossing D. cloning 16. The pairs of alleles in an organism\'s genetic makeup are called A. phenptype B. genotype C. parental type D. filial type Solution False: As the distance between two gene increases frequency of crossing over between them a also increases. True : In co dominance both allele are expressed equally True: Cross between plant having allele TT with plant having allele Tt will show dominant phenotype having genotype Tt True: Mutation is any sudden change in gene/ DNA that can lead to alteration in normal genetic make up of an organism False: DNA contain adenine , guanine , cytosine and thymine; Uracil is present in RNA Co-dominant alleles Pedigree: Change in genetic make up over generation can be seen in pedigree Missense mutation: Insertion or deletion can lead to missense mutation First generation b. Homozygous B.Phenotype Non disjunction: is the failure of homologous chromosome on sister chromatin to separate during cell division b.Semiconservative model in which one strand is old and another new A. Mendel choose plant which can do self pollination B.Genotype.

1. Biology questions: Please answer all of them
True or false. If false then state correct answer
1. The frequency of crossing over decreases with the distance seperating genes on a
chromosome.
2. Codominant alleles are expressed equally.
3. Under normal rules of domininace, if two diffferent alleles are present, the dominant allele is
expressed.
4. A mutagen is a substance that causes a change in DNA.
Multiple Choice questions:
5. A DNA nucleotide does not contain A. adenine B. thymine C. uracil
6. Human blood type is determined by A. codominant alleles B. a dominant alleles C. multiple
alleles D. sex-linked genes
7. People who carry genetic disorders (carriers) are A. codominant alleles B. thymine C. uracil
D. cytosine
8. A method to trace the inheritance of a trait over many generations is called a A. carrier tree B.
pedigree C. phenotype D. genotype
9. The insertion or deletion of a single base pair of DNA results in a A. missense mutation B.
nonsense mutation C. duplication mutation D. frameshift mutation
10. Gregor Mendel called the generation created by crossbreeding the parental generation the A.
second parental generation B. cross filial generation C. duplication mutation D. frameshift
mutation.
11. A recessive trait is expressed only in a individual who is A. heterozygous B. homozygous C.
haploid D. polygenic
12. A tall pea plant (TT) and a tall pea plant (Tt) have the same A. alleles B. phenotype C.
genotype D. filial type
13. The faliure of homolougus chromosomes to seperate properly during meiosis is calles A.
nondisjunction B. disjunction C. zygote faliure D. telomere faliure
14. Watson and Crick's model of DNA replication is called A. conservation B. semiconservative
C. transcription D. translation
15. Pea plants usually reproduce by A. self-pollination B. cross-pollination C. teste-crossing D.
cloning
16. The pairs of alleles in an organism's genetic makeup are called A. phenptype B. genotype C.
parental type D. filial type
Solution

2. False: As the distance between two gene increases frequency of crossing over between them a
also increases. True : In co dominance both allele are expressed equally True: Cross between
plant having allele TT with plant having allele Tt will show dominant phenotype having
genotype Tt True: Mutation is any sudden change in gene/ DNA that can lead to alteration in
normal genetic make up of an organism False: DNA contain adenine , guanine , cytosine and
thymine; Uracil is present in RNA Co-dominant alleles Pedigree: Change in genetic make up
over generation can be seen in pedigree Missense mutation: Insertion or deletion can lead to
missense mutation First generation b. Homozygous B.Phenotype Non disjunction: is the failure
of homologous chromosome on sister chromatin to separate during cell division
b.Semiconservative model in which one strand is old and another new A. Mendel choose plant
which can do self pollination B.Genotype