Bio Unit 7- Genetics

What describes the genotypes of the parents that would result in this Punnett Square?

• both are heterozygous

• both are homozygous dominant

• one parent is homozygous recessive and the other is heterozygous

• one parent is homozygous dominant and the other parent is heterozygous

NN= normal cholesterol levels

Nn= slightly elevated chlolesterol levels

nn= greatly elevated cholesterol levels

Which describes the interaction of N and G alleles for the gene?

• N allele is recessive to n allele

• N is incompletely dominant to n allele

• N allele assorts independently from N allele

• N allele completely masks the phenotype of the N allele

What word means that a trait is controlled by more than one gene?

• Polygenetic

• Sex-linked

• Incomplete dominance

• Complete dominance

Which of the following is a polygenetic trait?

• dimples

• human height

• widow's peak

Color-blindedness is a sex-linked trait and is recessive to normal eyesight. A female fly that is a carrier is crossed with a male fly with color blindedness. What would be the outcomes of the cross?

• Chance of color blind is 75%

• Chance of normal sight is 50%

• Chance of male offspring with colorblindedness is 0%

• Chance of female with colorblindedness is 100%

Blood type is inherited through multiple alleles. If a child has Typle A blood and his mother has Type AB blood, what are the possible phenotypes of the father?

• Type O, A, B, or AB

• Type A, B, or AB

• Type O or A

• Type A or AB

Physical, observable trait resulting from a given gene

• genotype

• phenotype

• allele

• chromosome

The set of alleles an organism has

• genotype

• phenotype

• characteristic

• chromosome

To produce a small Chihuahua, scientists small dogs from different litters for many generations. This is an example of

• genetic recomination

• mutation

• selective breeding

• natural selection

Taking a gene from one organism and inserting into the DNA of a different organism is part of the process of _________

• selective breeding

• genetic engineering

• cloning

• natural selection