A sex cell formed in the male reproductive organs that contains half the number of chromosomes as body cells
sperm
Two flowers are crossed and their resulting offspring genotypes are 50% RR and 50% Rr. What are the parent genotypes?
RR and Rr
The first generation of offspring obtained from an experimental cross of two organisms
f1 generation
Which trait will always express itself regardless of what other trait it is paired with?
Dominant
In flowers, red (R) is dominant over yellow (r) . What would be the potential phenotypes of potential offspring if parent 1’s genotype is RR and parent 2’s is rr?
100% red
What are the different forms of a gene called?
Alleles
How many chromosomes do human sperm and egg cells (gametes) have?
23
In humans, brown eyes (B) is dominant to blue eyes (b). If two parents have brown eyes, but are carriers for the blue eye allele, what is the probability they will have offspring with blue eyes?
25%
What is the passing down of traits from one generation to next generation?
Heredity
XX is what gender?
female
An allele that is masked when a dominant allele is present
recessive allele
Where is genetic material located in a plant or animal cell?
Nucleus
A chart that shows all possible combinations of alleles.
punnett square
The second generation of offspring, obtained from an experimental cross of two organisms; the offspring of the F1 generation
f2 generation
An allele whose trait always shows up in the organisms when the allele is present
dominant allele
Who is considered the father of modern genetics?
Gregor Mendel
How many alleles for a trait will you pass on to your child?
1
In flowers, red (R) is dominant to yellow (r). If two flowers that are heterozygous are crossed, what would be their potential genotypes of their offspring?
25% RR 50% Rr 25% rr
What is the structure made of tightly coiled DNA?
Chromosome
What is a section of DNA called?
Gene
_____ plants are a good choice to use by Mendel because they are fast growing and easy to raise.
Pea
What is a characteristic or feature determined by genes?
Inherited Trait
Having two different alleles for a trait
heterozygous
AA x Aa
50% AA, 50% Aa, 0% aa
sex A cell formed in the female reproductive organs that contains half the number of chromosomes as body cells.
egg cell
The genetic makeup of an organism
genotype
This process makes identical body cells to allow organisms to grow and repair tissue. Also used for Asexual reproduction.
Mitosis
What is the observable characteristics in an individual resulting from the expression of genes?
phenotype
The study of how traits are inherited in offspring
Genetics
At minimum, how many dominant alleles do you need to show the dominant trait
1
aa x AA
0% AA, 100% Aa, 0% aa
In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. What are the chances for an offspring with the genotype Rr?
50%
Aa x Aa
25% AA, 50% Aa, 25% aa
What are the chances of a woman with Type AB and a man with Type A having a child with Type O?
0%
True or False: In his genetics experiments with pea plants, Gregor Mendel determined traits were passed down in a random pattern.
False: It is in a predictable pattern
In dogs, brown fur (B) is dominant to black fur (b). What must be the parent genotypes of a puppy with black fur?
bb and bb
Cell division where the chromosomes in a cell nucleus are separated into two identical sets of chromosomes, each in its own nucleus.
mitosis
True or False: Chromosomes contain genes
True
Cell division that halves the number of chromosomes when forming sex cells
meiosis
How many chromosomes do humans have?
46 or 23 pairs
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