Biology
Grade-9
Easy
Question
Which of the following is homozygous recessive?
- Tt
- tt
- TT
- T
The correct answer is: tt
- Homozygous, as related to genetics, refers to having inherited the same alleles of a genomic marker from each biological parent.
- Homozygous, as related to genetics, refers to having inherited the same alleles of a genomic marker from each biological parent.
Related Questions to study
Biology
Which of the following is homozygous dominant?
- Jj
- Rr
- MM
- ee
Which of the following is homozygous dominant?
BiologyGrade-9
- Jj
- Rr
- MM
- ee
Biology
What did Mendel notice?
- Most pea flowers were tall, and some were purple.
- Most of the pea flowers were white, but a few were purple.
- Most of the pea flowers were purple, but a few were white.
- Most pea flowers were short, and some were white.
What did Mendel notice?
BiologyGrade-9
- Most pea flowers were tall, and some were purple.
- Most of the pea flowers were white, but a few were purple.
- Most of the pea flowers were purple, but a few were white.
- Most pea flowers were short, and some were white.
Biology
Why pea plants were perfect to study on heredity?
- Pea plants are complex
- They were easy to study
- One gene controlled one trait
- One gene was controlled by multiple traits
Why pea plants were perfect to study on heredity?
BiologyGrade-9
- Pea plants are complex
- They were easy to study
- One gene controlled one trait
- One gene was controlled by multiple traits
Biology
What specifically about Pea Plants did Mendel study?
- Color of pea flower
- Colors of individual peas
- Texture of peas
- All of these
What specifically about Pea Plants did Mendel study?
BiologyGrade-9
- Color of pea flower
- Colors of individual peas
- Texture of peas
- All of these
Biology
What was the theory of genetics before Mendel did his experiments?
- All traits were random
- All traits skipped a generation
- All traits were decided by God
- All traits were a mixing of the parent’s traits
What was the theory of genetics before Mendel did his experiments?
BiologyGrade-9
- All traits were random
- All traits skipped a generation
- All traits were decided by God
- All traits were a mixing of the parent’s traits
Biology
What did Gregor Mendel study?
- Mold spores
- Pea plants
- Sun flowers
- Rats
What did Gregor Mendel study?
BiologyGrade-9
- Mold spores
- Pea plants
- Sun flowers
- Rats
Biology
The traits of an organism are passed to its offspring on small coded strands of DNA material called__________.
- Meiosis
- Recessive traits
- Genes
- Heredity
The traits of an organism are passed to its offspring on small coded strands of DNA material called__________.
BiologyGrade-9
- Meiosis
- Recessive traits
- Genes
- Heredity
Biology
Genes always appear in pairs. Your parents donate ________ allele for every trait.
- 1
- 2
- 23
- 46
Genes always appear in pairs. Your parents donate ________ allele for every trait.
BiologyGrade-9
- 1
- 2
- 23
- 46
Biology
What type of organism was used to determine the basic patterns of heredity?
- Fruit flies
- Dogs
- Potato plants
- Pea plants
What type of organism was used to determine the basic patterns of heredity?
BiologyGrade-9
- Fruit flies
- Dogs
- Potato plants
- Pea plants
Biology
Segments of DNA are called _______________________.
- Genes
- Alleles
- Traits
- Chromosomes
Segments of DNA are called _______________________.
BiologyGrade-9
- Genes
- Alleles
- Traits
- Chromosomes
Biology
If brown hair is represented by the allele "B" and blond hair is represented by the allele "b", then what must be the genotype of someone who has blond hair?
- BB
- bb
- Bb
- Either BB or Bb
If brown hair is represented by the allele "B" and blond hair is represented by the allele "b", then what must be the genotype of someone who has blond hair?
BiologyGrade-9
- BB
- bb
- Bb
- Either BB or Bb
Biology
A segment of DNA that codes for a trait is:
- Gene
- Centromere
- Chromosome
- Chromatid
A segment of DNA that codes for a trait is:
BiologyGrade-9
- Gene
- Centromere
- Chromosome
- Chromatid
Biology
More than _______ alleles that control a trait are called multiple alleles.
- 5
- 1
- 2
- 10
More than _______ alleles that control a trait are called multiple alleles.
BiologyGrade-9
- 5
- 1
- 2
- 10
Biology
Which of the following is a genetic trait?
- Time
- Temperature
- Eye color
- Diet
Which of the following is a genetic trait?
BiologyGrade-9
- Time
- Temperature
- Eye color
- Diet
Biology
___________________________ is the field of science that studies of how traits are passed on, or inherited.
- Dominant traits
- Ratio
- Phenotype
- Genetics
___________________________ is the field of science that studies of how traits are passed on, or inherited.
BiologyGrade-9
- Dominant traits
- Ratio
- Phenotype
- Genetics