WorksheetsGenetics and Heredity 7th Life Science Allen
Total questions: 25
Worksheet time: 6hrs 15mins
If two black (Bb) cats mate, what percentage of their kittens will probably have black hair?
A. 25%
B. 50%
C. 100%
D. 75%
Two parents have the trait for dark hair. They pass this trait on to their offspring. This passing of traits from parents to offspring is known as _____________________.
A. Probability
B. Recessive
C. Meiosis
D. Heredity
A dog breeder allows only certain dogs to breed over several generations in order to produce offspring that have certain traits. Which of the following processes is responsible for the desirable traits present in the offspring?
A. Natural selection
B. Selective breeding
C. A mutation
D. Genetic engineering
A. Tall plants only
B. Short plants only
C. Half tall plants and half short plants
D. Tall, short, and medium plants
A. T T
B. t t
C. T t
D. Both T T and t t
The allele for long nose in dogs is N and the allele for short nose is n. Could two dogs with long noses be the parents of a dog with short nose?
A. No; one of the parents would have to have a short nose
B. No; both of the parents would have to have short noses
C. Yes; this could happen if the parents’ parents had long noses
D. Yes; this could happen if both parents had recessive genes for short noses
Which is MOST likely the purpose of selectively breeding work horses on a farm?
A. To breed a horse that produces less offspring than other horses
B. To breed a horse that is stronger than other horses
C. To breed a horse smaller than other horses
D. To breed a horse that is weaker than other horses
Frogs reproduce by sexual reproduction. A frog can lay dozens of eggs at one time. These eggs cells are created through a process known as ____________________.
A. mitosis
B. meiosis
C. respiration
D. Photosynthesis
Staphylococcus is a type of bacteria that lives and reproduces inside other organisms. It can be both beneficial and harmful to its host organism. Staphylococcus bacteria reproduce through a process called binary fission. One cell splits, forming two new cells that are genetically identical to the parents. This process is known as ______________.
A. Sexual reproduction
B. Asexual reproduction
C. fermentation
D. Natural selection
Mammals reproduce using sexual reproduction. It takes two (2) parents to produce an offspring. What can you infer about the number of chromosomes in each reproductive cell?
A. Each cell has half the number of chromosomes as the body’s cells
B. Each cell has the same number of chromosomes as the body’s cells
C. Each cell has more than twice the number of chromosomes as the body’s cells
D. Each cell has exactly twice the number of chromosome as the body’s cells
A. 7
B. 23
C. 14
D. 10
A. Half the number of chromosomes as the body cells
B. The same number of chromosomes as the body cells
C. More than the number of chromosomes as the body cells
D. Exactly twice the number of chromosomes as the body’s cells
A. 25%
B. 50%
C. 75%
D. 100%
When Mendel transferred pollen from one pea plant to another pea plant, he was _________________ the plants.
A. Self-fertilizing
B. Cross-blending
C. Self-pollinating
D. Cross-pollinating
A scientist crossed two tall pea plants. Out of the offspring, 9 plants were tall and 3 were short. What percentage of the pea plants was short?
A. 10%
B. 13%
C. 25%
D. 50%
A scientist crossed two tall pea plants which had round seeds. Out of the offspring, 600 plants had round seeds and 200 had wrinkled seeds. What percentage of the pea plants had round seeds?
A. 25%
B. 13%
C. 75%
D. 50%
How does asexual reproduction differ from sexual reproduction?
A. Asexual involves only one parent
B. Asexual results in a single offspring
C. Asexual occurs only in organisms that live in water
D. Asexual does not involve the copying of genetic information
A. 25%
B. 50%
C. 75%
D. 100%
Many organisms such as sea stars, fungi, and sponges reproduce by producing offspring that are genetically identical to themselves. Only one parent is needed to reproduce in this way. This process is called________.
A. Sexual reproduction
B. Asexual reproduction
C. fermentation
D. Natural selection
A poultry farmer isolates roosters and hens of specific breeds in order to produce offspring that will display desired colors and patterns in their feathers. The monitoring observations and recording of findings. Which of the terms best identifies this process responsible for obtaining the desirable traits in the off spring?
A. Natural selection
B. Selective breeding
C. A mutation
D. Genetic engineering
What type of reproduction produces fungi that are different from either parent?
A. budding
B. Asexual reproduction
C. Sexual reproduction
D. Dividing
There are usually ______ alleles for each trait.
A. one
B. two
C. three
D. four
__________ is the study of how genes are passed from parent to offspring.
A. biology
B. genetics
C. ecology
D. paleontology
When present, which trait will always be expressed?
A. dominant
B. recessive
C. Co-dominant
D. Incomplete dominance
__________ is the term for the physical appearance of a trait that results from sexual reproduction.
A. phenotype
B. genotype
C. heredity
D. mitosis
