Biology U3 True/False
A family pedigree is a chart of various patterns that shows a general trend.
False
A pedigree is not helpful to a counselor in predicting the probability of a recessive gene being present and the chances for an offspring to receive the gene and express the trait.
False
A recessive gene cannot be hidden by a dominant one.
False
All the gene pairs from one parent can congregate in one gamete and those from the other parent in other gamete.
False
Each chromosome represents a single gene.
False
Gametes are associated with diploid chromosomes.
False
Gregor Mendel is sometimes called the father of chemistry.
False
Hemophilia is a condition where the blood clotting action is dangerously high.
False
In considering sex-linked inheritance, both sexes are equally susceptible to the manifestation of the trait.
False
In considering this cross (YyRr and YyRr), the genotype ratio is: YYRR; 2YYRr; 2Yyrr; 4YyRr; YYrr; 2Yyrr; yyRR; yyRr; yyrr.
False
In sex-linked inheritance, females are most susceptible because they have only one X chromosome. Therefore, whichever gene is present, be it dominant or recessive, it is expressed. The male has two X chromosomes, and in order to be expressed, both genes must be recessive.
False
Intelligence is not related to heredity.
False
Most traits are determined by one pair of genes.
False
Nondisjunction is limited to fruit flies.
False
Plants purebred for tallness can be Tt or TT.
False
Sex determination is an example of environmental factors influencing the phenotype.
False
Somatic cells are haploid.
False
The blood of an organism is responsible for passing genes from parent to child.
False
The various types of taste buds are distributed evenly in the tongue.
False
A couple who is extremely intelligent can give birth to a child who is below average intelligence.
True
A female can be susceptible to expressing hemophilia.
True
A mutation may cause a change in the genotype of a trait.
True
A nucleotide is a phosphate-sugar-nitrogen base.
True
A scientific law may be used to predict the outcome of experiments.
True
A scientific law requires that all observations and experiments verify the theory.
True
All members of each species have the same number of chromosomes
True
All members of each species have the same number of chromosomes.
True
Blood types are inherited, but the blood does not pass on the traits.
True
Chromosomes are located in the nucleus of the cell.
True
Chromosomes other than sex chromosomes are autosomes.
True
Each chromosome usually contains multiple genes.
True
Experiments and observations verify scientific laws.
True
In general, the "Y" sex chromosome does not appear to exert as much genetic influence as the "X" chromosome.
True
In order for us to taste something, the substance must be dissolved in liquid.
True
In some cases, one gene may tend to control the effect, but the trait may be changed somewhat by other genes.
True
Many undesirable traits in humans are recessive.
True
Meiosis is the process that results in the production of the haploid number of chromosomes.
True
Mendel's dwarf pea plants were always purebred dwarfs (tt).
True
Punnett Squares are helpful for studying genetics.
True
The chromosome number of a human female is 44 + XX; of a male, 44 + XY.
True
The presence of tight ligaments in the thumb is a recessive trait.
True
The sense of taste is inherited.
True
The shape of a child's head may be the result of one or more pairs of the parents genes.
True
Twenty-three is the haploid number of chromosomes in man.
True
