Question

babies were born during a power outage at the hospital. during the commotion they got mixed up. luckily each baby has a different blood type a, b, ab & o. which baby is correctly paired with his/her parents?baby with blood type o with parents with blood type o and abbaby with blood type a with parent with blood type 0 and 0baby with blood type ab with parent with blood type ab and obaby with blood type b with parent with blood type ab and ojohn has genotype nn. his genotype would best be described as:heterozygous dominanthomozygous dominanthomozygous recessiveheterozygous recessivewhat is the genotype of a plant that has round seeds if the parent has wrinkled seeds? (assume that round is dominant.)rrrr

Explanation:

Step1: Analyze first blood type pairing

Blood type is determined by alleles: O is recessive ($ii$), A is $I^A$ (dominant), B is $I^B$ (dominant), AB is $I^A I^B$.

• Baby O ($ii$): Parents O ($ii$) & AB ($I^A I^B$) can only pass $i$ and $I^A/I^B$ → no $ii$ possible.
• Baby A: Parents O & O ($ii$) can only pass $i$ → baby must be O, not A.
• Baby AB ($I^A I^B$): Parents AB ($I^A I^B$) & O ($ii$) can pass $I^A/I^B$ and $i$ → baby can only be A or B, not AB.
• Baby B: Parents AB ($I^A I^B$) & O ($ii$) → parent AB can pass $I^B$, parent O passes $i$ → baby can be $I^B i$ (type B), which is valid.

Step2: Analyze genotype description

Genotype $nn$ has two identical recessive alleles. By definition, this is homozygous recessive.

Step3: Analyze plant genotype

Round (R) is dominant, wrinkled (r) is recessive. Wrinkled parent has genotype $rr$, so it can only pass $r$ allele. The round baby must inherit one $r$ from this parent, and one dominant $R$ from the other parent → genotype $Rr$.

Answer:

1. Baby with blood type B with parent with blood type AB and 0
2. homozygous recessive
3. Rr