Question

the sentences below. (2 points)
humans carry the same number of homologous chromosomes that affect their traits. however, people can have very different traits even when they come from the same family. the diagram below represents how human dna makes those varying traits possible.
diagram of dna, chromosomes, and genes
which of the following statements explains how dna functions to allow for varying traits that come from the same gene in different individuals?
select all that apply
a. a chromosome unravels to form proteins, which then reorganize to form genes.
b. each homologous chromosome from the parent will have the same gene sequence, but each gene is composed of different codes for the same trait genes called alleles.
c. proteins produce nucleotides that are arranged in a particular pattern to form the genes which coil to form chromosomes.
d. proteins form by combing several sections of chromosomes that are made of genes.
e. genes contain codes made by the arrangement of nucleotides that have instructions for building specific proteins.

1. in 1866, gregor mendel published \experiments in plant hybridization\, which articulates his basic theory of genetics.

what principle of heredity did mendel first suggest in his publication?
a. all living organisms have a form of genetic information known as dna.
b. organisms can possess the trait for several different genes due to their environment.
c. organisms that have certain traits for one gene will also have a certain trait for other genes.
d. inheritance involves the passing of units of inheritance from parents to offspring.

1. two parents have genotypes for a certain trait (pp). what is the chance for their offspring to exhibit the homozygous dominant genotype (pp)?

a. 0%
b. 25%
c. 50%
d. 75%

Explanation:

Question 29 (Select ALL that apply)

• Option A: Chromosomes don't unravel to form proteins first; DNA (in chromosomes) codes for proteins. So A is incorrect.
• Option B: Homologous chromosomes can have different alleles (variants) of the same gene, leading to varying traits. This is correct.
• Option C: Nucleotides form DNA (genes are parts of DNA), and proteins are made from DNA instructions, not the other way around. So C is incorrect.
• Option D: Proteins are synthesized from gene (DNA) instructions, not by combining chromosome sections. So D is incorrect.
• Option E: Genes are DNA segments with nucleotide sequences that code for specific proteins, which determine traits. This is correct.

• Option A: Mendel didn't know about DNA; his work was with traits and "factors" (now genes). So A is incorrect.
• Option B: Mendel's work was about inherited traits, not environmental influence on multiple genes. So B is incorrect.
• Option C: Mendel's work showed traits are independent (law of independent assortment), not linked this way. So C is incorrect.
• Option D: Mendel proposed that inheritance involves passing "units of inheritance" (now genes) from parents to offspring. This matches his theory.

Step1: Set up Punnett square

Parents are both \( Pp \). The possible gametes from each parent are \( P \) and \( p \).

	\( P \)	\( p \)
\( p \)	\( Pp \)	\( pp \)

Step2: Calculate probability of \( PP \)

From the Punnett square, the genotypes are \( PP \), \( Pp \), \( Pp \), \( pp \). So \( PP \) occurs 1 out of 4 times.
Probability \( = \frac{1}{4} = 25\% \)

Answer:

B. Each homologous chromosome from the parent will have the same gene sequence, but each gene is composed of different codes for the same trait genes called alleles, E. Genes contain codes made by the arrangement of nucleotides that have instructions for building specific proteins.

Question 30