"How is the genotype for a heterozygous individual written?"
A heterozygous individual has two different alleles. This could be a dominant and recessive (Aa) or two different dominant alleles (RW) as in codominance or incomplete dominance.
A heterozygous individual has two different alleles. This could be a dominant and recessive (Aa) or two different dominant alleles (RW) as in codominance or incomplete dominance.
"How is the genotype for a homozygous recessive individual written?"
A homozygous recessive individual has two recessive genes and is written as two lower-case letters (aa).
A homozygous recessive individual has two recessive genes and is written as two lower-case letters (aa).
"Complete and give the pheotype and genotype ratios"
4) A heterozygous white rabbit is crossed with a homozygous black rabbit.
Genotype: 2 Bb (50%), 2 bb (50%) Pheotype: 2 White, 2 Black The first rabbit is heterozygous, so it has a dominant allele. Since it is white, the dominant allele must be for the white trait. Since the black rabbit is homozygous, and the white allele is dominant, the black allele must be recessive.
|
"What is the difference between codominance and incomplete dominance?"
Codominance happens when there are two dominant alleles for a trait and they are both shown.
For example, a red and white flower would make a striped flower. A white cow and brown cow makes a brown and white spotted cow, also known as "roan". | Incomplete dominance happens when there are two dominant alleles for a trait and they are mixed.
For example, a red flower and a white flower would make a pink flower. |
"In some chickens, the gene for feather color is controlled by codiminance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette."
a. What is the genotype for black chickens? BB The chicken would have to have two black alleles
b. What is the genotype for white chickens? WW The chicken would have to have two white alleles
c. What is the genotype for erminette chickens? BW A black and white allele would make a black and white chicken
a. What is the genotype for black chickens? BB The chicken would have to have two black alleles
b. What is the genotype for white chickens? WW The chicken would have to have two white alleles
c. What is the genotype for erminette chickens? BW A black and white allele would make a black and white chicken