Mendel
Mendel used what in his experiments?
Pea plants
What is heredity?
passing on of traits/genes from parents to offspring
What is a gene?
Dominant alleles are shown how?
capital letter
In pea plants, tall (T) is dominant over short (t). A heterozygous tall plant (Tt) is crossed with a short plant (tt). What percentage of the offspring will have the genotype Tt?
50%
Purebred pea plants always produced same offspring?
True
What is phenotype
what an organism look like on the outside
What is an allele?
Different forms of a gene
Recessive alleles are shown how?
lowercase letters
In rabbits, black fur (B) is dominant over white fur (b). If a heterozygous black-fur rabbit (Bb) is crossed with a white-fur rabbit (bb), what percentage of the offspring will have black fur?
50%
Purebred tall with purebred short always produce what in the first generation?
purebred tall
What is genotype?
the alleles we inherit
Where do you get the 2 forms of the same gene from?
one from mom, one from dad
BB bb Bb
In a species of fish, red color (R) is dominant over blue color (r). Can two homozygous red fish produce offspring that are blue?
No
tall is dominant
What does recessive mean?
the gene that fades when there is a dominant allele
What does homozygous mean?
The alleles are the same (either 2 dominant or 2 recessive)
Which is homozygous? Bb Nn MM pp
MM and pp
In a population of dogs, the dominant allele (B) codes for black fur, and the recessive allele (b) codes for brown fur. A heterozygous black dog is crossed with another heterozygous black dog. What are the expected genotypes of the offspring? include percentages
25% BB
50% Bb
25% bb
how many pea plant were tall in the 2nd generation that Mendel had?
75%
What does dominant mean?
The gene that will always show if there is at least one of them (dominates the competition)
What does heterozygous mean?
The 2 allele are different (one recessive and one dominant)
What does a punnett square tell us?
the probability of what the genotypes and phenotypes of offspring between 2 individuals would be
In a certain species of birds, the dominant allele (A) results in a green feather color, while the recessive allele (a) results in a yellow feather color. Can a homozygous green-feathered bird and a yellow-feathered bird produce offspring with yellow feathers?
No