Continuity through Inheritance Flashcards
(34 cards)
The types of genes an individual carries, Bb or bb, would be their ______.
Genotype
Appearance as a result of those genes, blue eyes or blue would be their ______.
Phenotype
If an individual had the genotype BB or bb, they could be called ______ or _______.
Homozygous, purebred
If an individual had the genotype Bb, they could be called ______ or ______.
Heterozygous, hybrid
Mendel’s peas always seemed to show two forms of a trait, so he concluded that the ____ that governed these traits occurred in _____.
Factors, pairs
Your gene pairs are carried on _____ pairs of _____.
Homologous, chromosomes
When he crossed tall plants with short plants and the F1 all came out tall, he concluded that the gene for tall was _____ and the gene for short was _____.
Dominate, recessive
Because of the way ratios came out in the offspring, Mendel concluded that his pairs of factors must be _____ when _____ were formed.
Split, chromosomes
We now call the way ratios come out in the offspring his Principle of _____ and know that is occurs during _____ when pairs of ______ get split up.
Segregation, meiosis, chromosomes
Mendel’s Principle of ______ Assortment says that gene pairs are _________ of each other so that different gametes can be formed depending on the way that _______ line up in meiosis.
Independent, independent, homologous pairs
A _____ is a section of a chromosome that governs a single trait.
Gene
A gene carried on one chromosome matches the gene carried on the homologous chromosome, because both of these genes govern the same trait, they are called _______.
Homologous
Mendel’s pea plants produced either smooth or wrinkled peas. If smooth is dominant to wrinkled… S= ______ s=____
Smooth, wrinkled
Both parents are homozygous, one dominate and one recessive. What kind of cross would this make?
Purebred cross
Both parents are heterozygous. What kind of cross would this make?
Monohybrid
In guinea pigs rough coat (R) is dominate to smooth coat (r), while black coat (B) is dominate to white (b). Cross two heterozygous rough coat, black guinea pigs. What kind of cross would this be?
P1: RrBb x RrBb, dihydric cross
You are attempting to breed a purebred line of black Labradors where black coat (B) is dominate to golden (b). Your male dog shows a black coat, but you are unsure of his genotype. What genotypes are possible for your dog? What color female would you cross to determine? What would her genotype be?
BB Bb,
Golden,
bb
Incomplete dominance is when…
Both alleles blend to show phenotype of heterozygous, so neither is actually dominant
Can you tell the genotype with incomplete dominance when you look at the heterozygous?
Yes, because it is a mixture of the two homozygous alleles
Examples showing something that has incomplete dominance
Pea plants, and snap dragons
Codominance is when…
Both alleles are shown at the same time in the heterozygous
How will the heterozygous organisms look compared to the homozygous during codominance?
Heterozygous will show both traits while homozygous will show only one
Give an example showing something that has codominance
A cow with a spotted red and white coat
Which parent determines the sex of the child? Explain.
Father, he gives X or Y chromosome
