Question

1. in a punnett square, what do the boxes represent?

a. phenotypic ratios
b. genotypic ratios
c. total number of offspring
d. possible combinations of alleles in the offspring

1. which of the following function of dna did you learn about? (select all)

a. encoding proteins
b. conducting electrical impulses
c. synthesizing enzymes
d. storing and transmitting genetic information

1. which of the following best described alleles?

a. different variations of a gene that can code for variations of a trait
b. identical genes that determine a trait
c. the genetic makeup of an organism
d. the physical appearance of a trait

Explanation:

Question 1

A Punnett square is used to predict the possible genetic combinations of offspring from parental alleles. The boxes within it represent the possible allele combinations (genotypes) of the offspring. Phenotypic ratios are the observable trait ratios, genotypic ratios are the ratios of different genotypes, and the boxes don't represent total offspring count. So the correct option is d.

• DNA encodes proteins (through transcription and translation), stores and transmits genetic information.
• Conducting electrical impulses is a function of neurons, not DNA.
• Enzymes are proteins, and DNA encodes the information to make them, but DNA itself doesn't synthesize enzymes directly (ribosomes and other cellular machinery do). So the correct options are a and d.

Alleles are different versions of a gene that can lead to different trait variations. Identical genes (option b) are not alleles. The genetic makeup of an organism (option c) is genotype. The physical appearance (option d) is phenotype. So the correct option is a.

Answer:

d. Possible combinations of alleles in the offspring

Question 2