Inheritance 2023

What are small stretches of DNA that code for traits

• Nucleus
• Chromosomes
• Gene
• Centromeres

One form of a gene is called_______________

• a DNA
• a Phenotype
• a trait
• an allele

Who was the father of genetics 

• Sagan 
• Issac Newton 
• Gregor Mendel 
• C.jenkins 

The phenotype is the _______________.

• physical appearance of an organism
• Genetic makeup 
• Alleles acquired from a specific parent.

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

An allele whose trait always shows up in the organism when the allele is present.

• recessive allele
• dominant allele
• hidden allele
• present allele

Which genotype is heterozygous? (a)  

• BB
• bb
• CC
• Bb

Answer explanation

Heterozygous means that the genotype features alleles that are NOT identical. The dominant "B" is not the same as the recessive "b."

Complete the punnett square; what is the likelihood that an offspring is homozygous recessive?

• 1 in 4, or 25%

• 2 in 4, or 50%

• 1 in 2, or 50%

• 0 in 4, or o%

Answer explanation

Remember that the parent alleles represent sperm (male) and egg (female). We bring together one from each parent in each of the offspring squares to model mating.

If only ​ (a)   phenotypes are possible, the inheritance pattern is normal ​ (b)   . When three ​ (c)   are possible, and a heterozygote has a blended appearance, the inheritance pattern is ​ (d)   dominance.

• two
• dominance
• phenotypes
• incomplete
• co-
• genotypes