California State University, Northridge

BIO 101

Chapter 10

1)Many of your heritable traits are___________.

2. In an organism with the genotype Aa at a locus,                                                     .

3. What would be the outcome of these crosses between pea plants, where the allele for purple flowers (P) is dominant and the allele for white flowers

(p) is recessive at a flower color locus?

Cross a Pp plant with a Pp plant – , Cross a PP plant with a Pp plant –,

Cross a Pp plant with a pp plant –, Cross a pp plant with a pp plant –

Cross a PP plant with a pp plant –

4. Gregor Mendel concluded that each pea has two units of heritability for each trait, and each gamete contains one unit. These heritable "units" are now called:

5. A Punnett square                          

6. A Mendelian test cross is used to determine whether:

7. If a a woman who is NOT a carrier for colorblindness has a son with a man who DOES have X-linked colorblindness, the son will likely                                                                                                   

8. When we write a description of the alleles carried by an organism (for example writing Pp for a flower color locus in peas), we are showing:

9. A recessive allele is one:

10. If the allele for inflated pea pods (I) is dominant to the allele for constricted pods (i), then the cross Ii ? ii is expected to produce:
11. A suppose a child has blood group AB (i.e. one copy each of an A allele and B allele at the blood group locus), and his mother is blood type A while the father is blood type B. The AB phenotype is an example of        alleles:

12. In Mendel
13. Match the term with its best description:

Having two copies of the SAME version of a gene, at a chromosome locus –

An allele whose expression may be masked by another – , An allele that masks the expression of another – ,

Having a trait that is inherited in all offspring after self-fertilization –

Having two DIFFERENT versions of a gene, at a chromosome locus –