Show:
Definitions
Definitions
Definitions
Definitions
NJASK Practice
100
What is an allele?
a form of a gene
100
What is a dominant allele?
the allele that codes for the trait that appears in an offspring when two different alleles are paired
100
What is heredity?
the passing of traits from one generation to the next
100
What is a phenotype?
the observable traits of an organism
100
According to page 59, question 1, what can be concluded about the genotype based on the diagram?
A
200
What is asexual reproduction?
reproduction in which the offspring only has one parent
200
What is fertilization?
the process in which the egg and sperm cells of the parent organisms unite in the first stage of sexual reproduction
200
What is heterozygous?
having two different alleles for a single trait
200
What is a Punnet Square?
a grid used to show the possible gene combinations from teh crossing of two organisms
200
Which of the answer choices on page 59, question 2, is an example of an inherited trait?
B
300
What is binary fission?
the process of one complete cell dividing into two identical, complete cells
300
What is a gamete?
a specialized cell of sexual reproduction; the sperm or egg
300
What is homozygous?
having two identical alleles for a single trait
300
What is a recessive allele?
an allele that will not express itself in an organism when paired with a dominant allele
300
Which of the answer choices on page 59, question 3, best describes a gene?
C
400
What is a chromosome?
a threadlike, DNA-carrying strand that contains the genes that tell what traits an organism will have
400
What is a gene?
a unit found on a cell's chromosome that carries information about a trait of the organism
400
What is incomplete dominance?
a type of inheritance in which the traits of the parents appear to blend
400
What is reproduction?
the process of producing new organisms in a population
400
What is the name for the process in which gametes merge to produce a complete set of chromosomes?
fertilization
500
What is DNA?
the molecule that carries genetic information
500
What is a genotype?
the complete genetic makeup of an individual or species
500
What is meiosis?
the process of cell division at the beginning of sexual production that produces gametes with half as many chromosomes as original cells
500
What is a trait?
an inherited characteristic of a human being
500
A certain mammal has 12 chromosomes in a gamete cell. How many chromosomes are in a body cell of this mammal?
24