Question

1. in pigeons, the allele for normal feathers (f) is dominant to the allele for frizzy feathers (f). if a purebred, normal - feathered bird (ff) is crossed with a frizzy - feathered bird (ff), how many different feather phenotypes are possible in the offspring? a 1 b 2 c 3 d 4 2. which of these represents the dna segment from which this section of mrna was transcribed? a actaag b tcuttg c gaaucu d ucctga 3. dna molecules separate into single strands, which are then used to construct two identical strands of dna. this process ensures that the — a cytoplasm is in equilibrium b mitochondria are genetically identical to the chloroplasts c parent cells use little atp d daughter cells are genetically identical to the parent cells

Explanation:

Step1: Analyze pigeon cross

A pure - bred normal - feathered bird (FF) crossed with a frizzy - feathered bird (ff) will result in all offspring with genotype Ff. Since F is dominant, all offspring will have normal feathers, so 1 phenotype.

Step2: Recall DNA - mRNA transcription

In transcription, A in DNA pairs with U in mRNA, T with A, G with C, and C with G. The mRNA sequence UGAAUUC corresponds to DNA sequence ACTAAG.

Step3: Understand DNA replication

DNA replication produces two identical strands of DNA. This process ensures that daughter cells are genetically identical to the parent cells as they receive an exact copy of the parent's DNA.

Answer:

1. A. 1
2. A. ACTAAG
3. D. daughter cells are genetically identical to the parent cells