what types of alleles did the parents likely have, to produce the following offspring. The trait is black fur dominated to white fur
A. 30 white offspring and 87 black offspring
B. 29 white offspring and 32 black offspring
C. 25 white offspring
D. 55 black offspring
A. both heterogenouse for b and w
B. one ww, the other bw
C. ww, ww
D. bb,bw or bb,bb
To understand the inheritance of fur color in this scenario, we can use the concept of Mendelian genetics and the law of dominance. According to the law of dominance, in a genetic cross between two organisms with different traits, one trait (the dominant trait) will be expressed in the offspring, while the other trait (the recessive trait) will only be expressed if both alleles are recessive.
In this case, black fur color is dominant, and white fur color is recessive.
Let's analyze each scenario separately:
A. 30 white offspring and 87 black offspring:
In this scenario, since black fur is dominant, we can infer that both parent organisms must have at least one black fur allele (B). Since there were white offspring produced, both parents must also have at least one white fur allele (b). Therefore, the possible genotype combinations for the parents could be:
Parent 1: Bb (one black allele, one white allele)
Parent 2: Bb (one black allele, one white allele)
B. 29 white offspring and 32 black offspring:
Similar to scenario A, both parents must have at least one black fur allele (B) since there were black offspring produced. However, this time, both parents must also have at least one white fur allele (b) to produce white offspring. Thus, the possible genotype combinations for the parents could be:
Parent 1: BB (two black alleles)
Parent 2: Bb (one black allele, one white allele)
C. 25 white offspring:
In this scenario, since there were only white offspring produced, both parents must have the recessive white fur allele (bb). Therefore, the possible genotype combinations for the parents could be:
Parent 1: Bb (one black allele, one white allele)
Parent 2: Bb (one black allele, one white allele)
D. 55 black offspring:
In this scenario, since there were only black offspring produced, both parents must have at least one black fur allele (B). Therefore, the possible genotype combinations for the parents could be:
Parent 1: BB (two black alleles)
Parent 2: BB (two black alleles)
Keep in mind that these are just possible genotype combinations based on the outcomes of the offspring. Without further information or genetic testing, we cannot determine the exact genotypes of the parents.