How can a pure white mouse help determine the genotype of a black mouse? (Hint: We cannot see genotype but we can see differences in the phenotype of their offspring). Answer: Black is dominant = B White is recessive = b A black mouse could be BB or Bb.
What is the genotype of a black mouse?
Mice with genotype cc are albino because all pigment production and deposition of pigment in hair is blocked. At the second locus, the B allele (black agouti coat) is dominant to the b allele (brown agouti coat). A mouse with a black agouti coat is mated with an albino mouse of genotype bbcc.
Is black fur or white fur dominant in mice?
In mice, black fur is dominant to white, and long fur is dominant to short.
What is the probability that a white mouse that is homozygous for long fur and a mouse heterozygous for both traits can have an offspring with short white fur?
The probability that a white mouse that is homozygous for long fur and a mouse heterozygous for both traits can have an offspring with short white fur is 0. Let us understand this by analysing the genes responsible for the traits and how they are inherited by the progeny.
What is the genotype of a homozygous black fur mouse?
If any of the offspring have black fur, the parental white mouse genotype is heterozygous. d. If all the offspring have black fur, the parental black mouse genotype is homozygous.
What is the genotype of the black fur parent what is the genotype of the white fur parent what are the genotypes of the offspring?
The black-fur parent has the genotype FF Ee, and the white-fur parent has the genotype ff Ee.
What would be the genotype for mice that are homozygous dominant for fur color?
For mice that are either homozygous dominant (PP) or heterozygous (Pp), the organism’s fur color is dictated by the other three genes (A/a, B/b, and C/c). For mice that are homozygous recessive (pp), large patches of the organism’s fur are white. This condition is called piebaldism.
What color is dominant in mice?
The dominant color in mice from black and white is black. The recessive gene in the black mice is in codominant and incomplete dominance with the white allele. However, the black mice have different recessive genes. We believe that these genes are white and brown.
How do you determine dominant and recessive traits?
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
When a mouse with black fur is crossed with a mouse with white fur?
When a mouse with black fur is crossed with a mouse with white fur, all f1 generation offspring have gray fur.
What do you think are the odds of getting four tails in a row explain your answer?
Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event. Therefore, the probability of getting tails 4 times in a row is 1/16.
What term would best be used to describe an organism possessing two identical alleles for a trait?
An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene.
What percentage of the offspring would be expected to have the same phenotype as the parents?
Parent 2’s phenotype is first trait dominant, second trait recessive, and third trait dominant. 1664 , or 25% of their offspring are expected to have the same phenotype as parent 2.
What color fur would a mouse have with the genotype AaBb?
The genotype in this question, AaBb, corresponds to black fur and brown eyes. Four mice out of every sixteen will have this genotype.
What is the genotype of the heterozygote?
Listen to pronunciation. (HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
What is the homozygous dominant genotype?
An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype.